David C Chang

Summary

Affiliation: University of California
Country: USA

Publications

  1. ncbi request reprint Demystifying sample-size calculation for clinical trials and comparative effectiveness research: the impact of low-event frequency in surgical clinical research
    David C Chang
    Department of Surgery, University of California, 200 West Arbor Dr, 8401, San Diego, CA 92103, USA
    Surg Endosc 27:359-63. 2013
  2. doi request reprint Adoption of endovascular repair of abdominal aortic aneurysm in California: lessons for future dissemination of surgical technology
    David C Chang
    Department of Surgery, University of California San Diego, San Diego, CA 92103 8400, USA
    Ann Vasc Surg 26:468-75. 2012
  3. doi request reprint Cost of inpatient care and its association with hospital competition
    David C Chang
    Department of Surgery, University of California San Diego, 92103 8401, USA
    J Am Coll Surg 212:12-9. 2011
  4. doi request reprint Density of surgeons is significantly associated with reduced risk of deaths from motor vehicle crashes in US counties
    David C Chang
    Department of Surgery, University of California, San Diego, CA, USA
    J Am Coll Surg 212:862-6. 2011
  5. pmc A review for clinical outcomes research: hypothesis generation, data strategy, and hypothesis-driven statistical analysis
    David C Chang
    Department of Surgery, University of California San Diego, 200 Arbor Drive, 8400, San Diego, CA 92103, USA
    Surg Endosc 25:2254-60. 2011
  6. doi request reprint Race and insurance status as risk factors for trauma mortality
    Adil H Haider
    Department of Surgery, Division of Trauma, Johns Hopkins Hospital, 600 N Wolfe St, Blalock 688, Baltimore, MD 21287, USA
    Arch Surg 143:945-9. 2008
  7. doi request reprint Postoperative venous thromboembolism rates vary significantly after different types of major abdominal operations
    Debraj Mukherjee
    Department of Surgery, Johns Hopkins School of Medicine, 600 North Wolfe Street, Blalock 610, Baltimore, MD 21287, USA
    J Gastrointest Surg 12:2015-22. 2008
  8. doi request reprint Treatment outcomes of injured children at adult level 1 trauma centers: are there benefits from added specialized care?
    Tolulope A Oyetunji
    Department of Surgery, Howard University College of Medicine, Washington, DC, USA
    Am J Surg 201:445-9. 2011
  9. ncbi request reprint Improved perioperative outcomes with minimally invasive distal pancreatectomy: results from a population-based analysis
    Hop S Tran Cao
    Department of Surgical Oncology, University of Texas MD Anderson Cancer Center, Houston2Department of Surgery, UC San Diego Health System, University of California, San Diego
    JAMA Surg 149:237-43. 2014
  10. doi request reprint Rapid discharge after transfer: risk factors, incidence, and implications for trauma systems
    Hayley B Osen
    Department of Surgery, Johns Hopkins School of Medicine, Baltimore, Maryland, USA
    J Trauma 69:602-6. 2010

Detail Information

Publications90

  1. ncbi request reprint Demystifying sample-size calculation for clinical trials and comparative effectiveness research: the impact of low-event frequency in surgical clinical research
    David C Chang
    Department of Surgery, University of California, 200 West Arbor Dr, 8401, San Diego, CA 92103, USA
    Surg Endosc 27:359-63. 2013
    ..The root of this problem is the low frequency of events in the majority of surgical clinical research. This exponentially increases the sample size needed to achieve statistical significance...
  2. doi request reprint Adoption of endovascular repair of abdominal aortic aneurysm in California: lessons for future dissemination of surgical technology
    David C Chang
    Department of Surgery, University of California San Diego, San Diego, CA 92103 8400, USA
    Ann Vasc Surg 26:468-75. 2012
    ..Knowledge of the pattern of adoption of endovascular approach (endovascular aortic repair [EVAR]) to abdominal aortic aneurysm (AAA) could direct future dissemination of complex surgical technology...
  3. doi request reprint Cost of inpatient care and its association with hospital competition
    David C Chang
    Department of Surgery, University of California San Diego, 92103 8401, USA
    J Am Coll Surg 212:12-9. 2011
    ..The purpose of this study is to determine whether this association holds true between objective measures of hospital competition and gross charges, by analyzing standardized operations where variations in costs should be minimal...
  4. doi request reprint Density of surgeons is significantly associated with reduced risk of deaths from motor vehicle crashes in US counties
    David C Chang
    Department of Surgery, University of California, San Diego, CA, USA
    J Am Coll Surg 212:862-6. 2011
    ..The purpose of this study is to quantify the effect of surgeon availability on deaths from motor vehicle crashes (MVC)...
  5. pmc A review for clinical outcomes research: hypothesis generation, data strategy, and hypothesis-driven statistical analysis
    David C Chang
    Department of Surgery, University of California San Diego, 200 Arbor Drive, 8400, San Diego, CA 92103, USA
    Surg Endosc 25:2254-60. 2011
    ....
  6. doi request reprint Race and insurance status as risk factors for trauma mortality
    Adil H Haider
    Department of Surgery, Division of Trauma, Johns Hopkins Hospital, 600 N Wolfe St, Blalock 688, Baltimore, MD 21287, USA
    Arch Surg 143:945-9. 2008
    ..To determine the effect of race and insurance status on trauma mortality...
  7. doi request reprint Postoperative venous thromboembolism rates vary significantly after different types of major abdominal operations
    Debraj Mukherjee
    Department of Surgery, Johns Hopkins School of Medicine, 600 North Wolfe Street, Blalock 610, Baltimore, MD 21287, USA
    J Gastrointest Surg 12:2015-22. 2008
    ..Venous thrombolism (VTE) is a significant cause of morbidity for surgical patients. Comparative risk across major procedures is unknown...
  8. doi request reprint Treatment outcomes of injured children at adult level 1 trauma centers: are there benefits from added specialized care?
    Tolulope A Oyetunji
    Department of Surgery, Howard University College of Medicine, Washington, DC, USA
    Am J Surg 201:445-9. 2011
    ..The authors hypothesized that no mortality difference should exist between children seen at ATC (adult trauma centers) versus ATC with added qualifications in pediatrics (ATC-AQ)...
  9. ncbi request reprint Improved perioperative outcomes with minimally invasive distal pancreatectomy: results from a population-based analysis
    Hop S Tran Cao
    Department of Surgical Oncology, University of Texas MD Anderson Cancer Center, Houston2Department of Surgery, UC San Diego Health System, University of California, San Diego
    JAMA Surg 149:237-43. 2014
    ..Interest in minimally invasive distal pancreatectomy (MIDP) has grown in recent years, but currently available data are limited. Greater insight into application patterns and outcomes may be gained from a national database inquiry...
  10. doi request reprint Rapid discharge after transfer: risk factors, incidence, and implications for trauma systems
    Hayley B Osen
    Department of Surgery, Johns Hopkins School of Medicine, Baltimore, Maryland, USA
    J Trauma 69:602-6. 2010
    ..The extent of secondary overtriage and factors associated with it remain largely undescribed...
  11. doi request reprint Redefining hypotension in the elderly: normotension is not reassuring
    Tolulope A Oyetunji
    Howard Hopkins Surgical Outcomes Research Center, Department of Surgery, Howard University College of Medicine, Washington, DC 20060, USA
    Arch Surg 146:865-9. 2011
    ..Recent debate concerns the most appropriate definition of hypotension. Some have advocated raising the systolic blood pressure (BP) threshold to 110 mm Hg while others favor 80 mm Hg...
  12. doi request reprint Early-stage gallbladder cancer in the Surveillance, Epidemiology, and End Results database: effect of extended surgical resection
    Stephanie R Downing
    Department of Surgery, Howard University College of Medicine, Washington, DC 20060, USA
    Arch Surg 146:734-8. 2011
    ..Extended surgical resection (ESR) may improve survival in patients with early-stage primary gallbladder cancer...
  13. doi request reprint Surveillance bias and deep vein thrombosis in the national trauma data bank: the more we look, the more we find
    Charles A Pierce
    Department of Surgery, Division of Trauma and Surgical Critical Care, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
    J Trauma 64:932-6; discussion 936-7. 2008
    ..We hypothesize that trauma centers with higher rates of duplex ultrasound detect more DVTs and subsequently report higher DVT rates to the National Trauma Data Bank...
  14. doi request reprint Evidence of hormonal basis for improved survival among females with trauma-associated shock: an analysis of the National Trauma Data Bank
    Adil H Haider
    Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland 21287, USA
    J Trauma 69:537-40. 2010
    ..Basic science research suggests that sex hormones affect survival after traumatic shock. This study sought to determine the independent effect of gender on mortality among trauma patients in different hormone-related age groups...
  15. doi request reprint Racial disparities in motorcycle-related mortality: an analysis of the National Trauma Data Bank
    Joseph G Crompton
    Department of Surgery, The Johns Hopkins University, Baltimore, MD 21287, USA
    Am J Surg 200:191-6. 2010
    ..The primary objective of this study was to determine if race is associated with MCC mortality...
  16. doi request reprint Comparison of pediatric surgical outcomes by the surgeon's degree of specialization in children
    Daniel Rhee
    Department of Surgery, Division of Pediatric Surgery, Johns Hopkins University School of Medicine, Baltimore, MD 21287 0005, USA
    J Pediatr Surg 48:1657-63. 2013
    ..The present study evaluates pediatric surgical outcomes through classifying surgeons by degrees of pediatric versus adult operative experience...
  17. doi request reprint Insurance status is a potent predictor of outcomes in both blunt and penetrating trauma
    Wendy R Greene
    Department of Surgery, Howard University College of Medicine, Washington, DC, USA
    Am J Surg 199:554-7. 2010
    ..Patients with penetrating injuries are known to have worse outcomes than those with blunt trauma. We hypothesize that within each injury mechanism there should be no outcome difference between insured and uninsured patients...
  18. doi request reprint NSQIP reveals significant incidence of death following discharge
    Peter Yu
    Department of Surgery, University of California San Diego, San Diego, California 92103 8402, USA
    J Surg Res 170:e217-24. 2011
    ..The NSQIP database captures 30-d outcomes not included within normal administrative databases, and can thus differentiate between in-hospital and post-discharge deaths...
  19. doi request reprint A practical index to predict 30-day mortality after major amputation
    Molly Crimmins Easterlin
    Department of Surgery, University of California San Diego, San Diego, CA 92103 8400, USA
    Ann Vasc Surg 27:909-17. 2013
    ..Patients at risk of mortality after amputation have not been well identified. We sought to devise a clinical index predicting 30-day mortality after amputation that would allow stratification of intensity of postoperative care...
  20. ncbi request reprint Long-term outcomes of patients with nonsurgically managed uncomplicated appendicitis
    Brandon A McCutcheon
    Department of Surgery, University of California, San Diego, CA Electronic address
    J Am Coll Surg 218:905-13. 2014
    ..Emerging literature has supported the safety of nonoperative management of uncomplicated appendicitis...
  21. doi request reprint Can universal coverage eliminate health disparities? Reversal of disparate injury outcomes in elderly insured minorities
    Michelle Ramirez
    Department of Surgery, University of California, San Diego, School of Medicine, San Diego, CA 92103 8402, USA
    J Surg Res 182:264-9. 2013
    ..We hypothesized that such disparities might be reduced in the elderly owing to insurance coverage under Medicare. We investigated this issue by comparing the trauma outcomes in young and elderly patients in California...
  22. doi request reprint Surgeon- and system-based influences on trauma mortality
    Elliott R Haut
    Department of Surgery, The Johns Hopkins University School of Medicine, 600 N Wolfe St, Osler Bldg, Room 625, Baltimore, MD 21287, USA
    Arch Surg 144:759-64. 2009
    ....
  23. doi request reprint The impact of insurance status on actuarial survival in hospitalized trauma patients: when do they die?
    Stephanie R Downing
    Department of Surgery, Howard University College of Medicine, Washington, District of Columbia, USA
    J Trauma 70:130-4; discussion 134-5. 2011
    ..The purpose of this study is to investigate whether these factors exerted survival impact that could be observed throughout the hospital stay...
  24. doi request reprint Disparities in access to left ventricular assist device therapy
    David L Joyce
    Department of Surgery, Johns Hopkins University, Baltimore, Maryland, USA
    J Surg Res 152:111-7. 2009
    ..We hypothesized that utilization of this complex and expensive treatment modality would be influenced by disparities in access to health care...
  25. doi request reprint Examining a common disease with unknown etiology: trends in epidemiology and surgical management of appendicitis in California, 1995-2009
    Jamie E Anderson
    Department of Surgery, Center for Surgical Systems and Public Health, University of California San Diego, 200 W Arbor Drive, San Diego, CA 92103, USA
    World J Surg 36:2787-94. 2012
    ..The study was designed to examine the epidemiology of appendicitis and risk factors of perforation and appendectomy...
  26. doi request reprint Comparison of long-term survival after open vs endovascular repair of intact abdominal aortic aneurysm among Medicare beneficiaries
    Rubie Sue Jackson
    Department of Surgery, Georgetown University Hospital, 3800 Reservoir Rd, Washington, DC 20007, USA
    JAMA 307:1621-8. 2012
    ..Endovascular repair of abdominal aortic aneurysm (AAA) compared with open repair increases perioperative survival, but it is not known if it increases long-term survival...
  27. doi request reprint Prehospital intravenous fluid administration is associated with higher mortality in trauma patients: a National Trauma Data Bank analysis
    Elliott R Haut
    Division of Acute Care Surgery, Department of Surgery, The Johns Hopkins Hospital, 600 N Wolfe St, Baltimore, MD 21287, USA
    Ann Surg 253:371-7. 2011
    ..We hypothesized that trauma patients who received prehospital IV fluids have higher mortality than trauma patients who did not receive IV fluids in the prehospital setting...
  28. doi request reprint Predictors of posttraumatic deep vein thrombosis (DVT): hospital practice versus patient factors-an analysis of the National Trauma Data Bank (NTDB)
    Elliott R Haut
    Division of Acute Care Surgery, Department of Surgery, The Johns Hopkins University School of Medicine, Baltimore, Maryland 21287, USA
    J Trauma 66:994-9; discussion 999-1001. 2009
    ..We hypothesize that admission to trauma centers that use duplex ultrasound more frequently, independently predicts DVT reporting for individual patients, controlling for patient-level risk factors...
  29. ncbi request reprint Pediatric trauma at an adult trauma center
    Suryanarayana Siram
    Department of Surgery, Howard University College of Medicine, Washington, DC 20060, USA
    J Natl Med Assoc 102:692-5. 2010
    ..Accidental traumatic injury is the number 1 cause of morbidity and mortality in the pediatric population. In this study, we aim to prove that certain pediatric patients can be treated with good outcomes at an adult level 1 trauma center...
  30. pmc Older age increases short-term surgical complications after primary knee arthroplasty
    Molly C Easterlin
    Department of Surgery, University of California, San Diego, 200 West Arbor Drive 8400, San Diego, CA 92103 8400, USA
    Clin Orthop Relat Res 471:2611-20. 2013
    ..Age is a known risk factor for complications after knee arthroplasty; however, age-related risks for a variety of complications of total and partial knee arthroplasties have not been well quantified...
  31. doi request reprint Disparities in trauma care: are fewer diagnostic tests conducted for uninsured patients with pelvic fracture?
    Oluwaseyi B Bolorunduro
    Department of Surgery, Howard Hopkins Center for Outcomes Research, Howard University College of Medicine, 2041 Georgia Avenue Northwest, Washington, DC 20060, USA
    Am J Surg 205:365-70. 2013
    ..Our objective was to examine differences in diagnostic and therapeutic procedures administered to patients undergoing trauma with pelvic fractures using a national database...
  32. doi request reprint Can hospitals "game the system" by avoiding high-risk patients?
    David C Chang
    Department of Surgery, University of California San Diego, San Diego, CA 92103 8401, USA
    J Am Coll Surg 215:80-6; discussion 87. 2012
    ..We hypothesize that avoidance of high-risk patients will not change risk-adjusted rankings...
  33. pmc Is there a difference in survival between right- versus left-sided colon cancers?
    Robert A Meguid
    Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
    Ann Surg Oncol 15:2388-94. 2008
    ..It is unclear whether patient prognosis varies by tumor location. In this study, we have compared the survival of right-and left-sided colon cancers in a longitudinal population-based database...
  34. pmc Variations in referral patterns to high-volume centers for pancreatic cancer
    David C Chang
    Department of Surgery, Johns Hopkins School of Medicine, 600 North Wolfe St, Baltimore, MD 21287, USA
    J Am Coll Surg 209:720-6. 2009
    ..This study noted trends in access to high-volume centers for pancreatic resection and identified gaps in improving access...
  35. doi request reprint Does the pattern of injury in elderly pedestrian trauma mirror that of the younger pedestrian?
    Suryanarayana M Siram
    Department of Surgery, Howard University College of Medicine, Washington, DC 20060, USA
    J Surg Res 167:14-8. 2011
    ..This study is aimed at evaluating the pattern of injury in the elderly pedestrians and how it differs from younger patients...
  36. doi request reprint Ureteral trauma: patterns and mechanisms of injury of an uncommon condition
    Suryanarayana M Siram
    Department of Surgery, Howard University College of Medicine, 2041 Georgia Avenue, NW, Washington, DC 20060, USA
    Am J Surg 199:566-70. 2010
    ..Traumatic ureteral injuries are uncommon, thus large series are lacking...
  37. ncbi request reprint Surgical treatment for women with breast cancer: do randomized clinical trials represent current medical practices?
    Wayne A I Frederick
    Department of Surgery, Howard University College of Medicine, Washington, DC, USA
    Am Surg 76:630-6. 2010
    ..71, 95% confidence interval = 0.67-0.74, P < 0.001). This population-based study suggests that there is a survival benefit for women undergoing PMR in the treatment of breast cancer...
  38. doi request reprint Hazards of benchmarking complications with the National Trauma Data Bank: numerators in search of denominators
    Shahrzad Kardooni
    Division of Trauma and Surgical Critical Care, Department of Surgery, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
    J Trauma 64:273-7; discussion 277-9. 2008
    ..We examined the suitability of the National Trauma Data Bank (NTDB) as a reference for benchmarking trauma center complication rates...
  39. doi request reprint Differential association of race with treatment and outcomes in Medicare patients undergoing diverticulitis surgery
    Eric B Schneider
    Center for Surgical Trials and Outcomes Research, Department of Surgery, The Johns Hopkins School of Medicine, 600 N Wolfe St, Harvey Ste 611, Baltimore, MD 21287, USA
    Arch Surg 146:1272-6. 2011
    ..Observed racial disparities in diverticulitis surgery have been attributed to differences in health insurance status and medical comorbidity...
  40. doi request reprint Projected lifetime risks and hospital care expenditure for traumatic injury
    David C Chang
    Department of Surgery, University of California, San Diego, San Diego, California 92103, USA
    J Surg Res 176:567-70. 2012
    ..The cumulative incidence rates methodology, based on a cross-sectional population analysis, offers an alternative approach to prohibitively costly prospective cohort studies...
  41. doi request reprint The occurrence of potential patient safety events among trauma patients: are they random?
    David C Chang
    Department of Surgery, Johns Hopkins School of Medicine, Baltimore, MD 21287, USA
    Ann Surg 247:327-34. 2008
    ..The Patient Safety Indicators (PSIs) from the Agency for Healthcare Research and Quality are validated measures of quality of care. The pattern of PSIs among adult trauma patients is unknown...
  42. doi request reprint Duplex ultrasound screening for deep vein thrombosis in asymptomatic trauma patients: a survey of individual trauma surgeon opinions and current trauma center practices
    Elliott R Haut
    Division of Acute Care Surgery, Department of Surgery, The Johns Hopkins University School of Medicine, Baltimore, Maryland 21287, USA
    J Trauma 70:27-33; discussion 33-4. 2011
    ..We hypothesized that trauma surgeons have varying opinions regarding duplex ultrasound screening for DVT in asymptomatic trauma patients, which result in varying practice patterns...
  43. doi request reprint Multiple imputation in trauma disparity research
    Tolulope A Oyetunji
    Department of Surgery, Howard University College of Medicine, Washington, DC 20060, USA
    J Surg Res 165:e37-41. 2011
    ..Missing data has remained a major disparity in trauma outcomes research due to missing race and insurance data. Multiple imputation (M.IMP) has been recommended as a solution to deal with this major drawback...
  44. doi request reprint Spine immobilization in penetrating trauma: more harm than good?
    Elliott R Haut
    Division of Acute Care Surgery, Department of Surgery, The Johns Hopkins Hospital, 600 North Wolfe Street, 625 Osler, Baltimore, MD 21287, USA
    J Trauma 68:115-20; discussion 120-1. 2010
    ..We hypothesized that penetrating trauma patients who are spine immobilized before transport have higher mortality than nonimmobilized patients...
  45. doi request reprint A novel multispecialty surgical risk score for children
    Daniel Rhee
    Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD 21287 0005, USA
    Pediatrics 131:e829-36. 2013
    ..Our objective was to develop a risk stratification model that predicts mortality after surgical operations in children...
  46. ncbi request reprint Predictors of marginal ulcers after laparoscopic Roux-en-Y gastric bypass
    Neil H Bhayani
    Department of Surgery, Howard University College of Medicine, Washington, District of Columbia, USA
    J Surg Res 177:224-7. 2012
    ..The etiology of marginal ulcers after gastric bypass has not been clearly defined. The purpose of this study was to identify independent risk factors for MU...
  47. doi request reprint Evaluating metrics for quality: death on the same day of elective pediatric surgery
    David C Chang
    University of California San Diego School of Medicine, CA, USA
    Am J Med Qual 27:195-200. 2012
    ..However, this metric may be useful at individual institutions as a case-finding tool for root-cause analysis in quality improvement efforts...
  48. ncbi request reprint Injured patients have lower mortality when treated by "full-time" trauma surgeons vs. surgeons who cover trauma "part-time"
    Elliott R Haut
    Division of Trauma and Critical Care, Department of Surgery, The Johns Hopkins Medical Institutions, Baltimore, Maryland 21287, USA
    J Trauma 61:272-8; discussion 278-9. 2006
    ..Studies examining the effect of trauma surgeon volume on patient outcomes have had disparate results. We hypothesize that "full-time" trauma surgeons would have lower patient mortality rates than surgeons covering trauma "part-time."..
  49. doi request reprint Demographically associated variations in outcomes after bariatric surgery
    Patricia L Turner
    Department of Surgery, General Surgery Division, University of Maryland Medical Center, Baltimore, 21201 1595, USA
    Am J Surg 201:475-80. 2011
    ..Despite this increase, there has been limited large-scale database evaluation of the effects of demographics on postoperative occurrences...
  50. ncbi request reprint Preoperative statin and diuretic use influence the presentation of patients undergoing carotid endarterectomy: results of a large single-institution case-control study
    Benjamin S Brooke
    Department of Surgery, Division of Vascular Surgery, Johns Hopkins Medical Institutions, Baltimore, MD, USA
    J Vasc Surg 45:298-303. 2007
    ..We undertook this study to see whether preoperative medication use or patient characteristics were associated with the presence of symptomatic cerebrovascular disease at the time of operation...
  51. ncbi request reprint Reported in-hospital complications following rib resections for neurogenic thoracic outlet syndrome
    David C Chang
    Department of Surgery, Johns Hopkins School of Medicine, Baltimore, MD 21205, USA
    Ann Vasc Surg 21:564-70. 2007
    ..The low incidence rates of these traditional clinical measures of outcome in TOS patients suggest that the appropriate measure for TOS patient outcome would be patient-reported quality of life or functional outcomes...
  52. doi request reprint The number of lymph nodes examined debate in colon cancer: how much is enough?
    Stephanie R Downing
    Department of Surgery, Howard University College of Medicine, Washington, DC 20060, USA
    J Surg Res 163:264-9. 2010
    ..Much debate exists over the significance of the number of lymph nodes (LN) examined after colon resection...
  53. doi request reprint Multiple treatment algorithms for successful outcomes in venous thoracic outlet syndrome
    Ricardo A de León
    Department of Surgery, Johns Hopkins Medical Institutions, Baltimore, MD, USA
    Surgery 145:500-7. 2009
    ..We sought to determine the outcomes in patients presenting with venous thoracic outlet syndrome...
  54. doi request reprint Negative appendectomy: a 10-year review of a nationally representative sample
    Shiva A Seetahal
    Howard Hopkins Center for Outcomes Research, Department of Surgery, Howard University College of Medicine, Washington, DC 20060, USA
    Am J Surg 201:433-7. 2011
    ..This study was conducted to show current statistics and trends in negative appendectomy rates in the United States...
  55. doi request reprint Mortality after ground-level fall in the elderly patient taking oral anticoagulation for atrial fibrillation/flutter: a long-term analysis of risk versus benefit
    Tazo Stowe Inui
    From the Department of Surgery Ta S I, R P, D C C, R C, University of California San Diego, San Diego, California and Indiana University Th S I, Indianapolis, Indiana
    J Trauma Acute Care Surg 76:642-9; discussion 649-50. 2014
    ..To inform this choice, we conducted a retrospective cohort study to assess long-term outcomes and risk factors for mortality after presentation with a ground-level fall among patients with and without OAC...
  56. doi request reprint Outcomes of isolated basilar skull fracture: readmission, meningitis, and cerebrospinal fluid leak
    Brandon A McCutcheon
    Division of Head and Neck Surgery, University of California San Diego, San Diego, California, USA
    Otolaryngol Head Neck Surg 149:931-9. 2013
    ..To determine rates of cerebrospinal fluid (CSF) leak, meningitis, and readmission in pediatric and adult patients with isolated basilar skull fracture...
  57. ncbi request reprint Pediatric injury outcomes in racial/ethnic minorities in California: diversity may reduce disparity
    Michelle Ramirez
    Department of Surgery, University of California, San Diego, La Jolla, CA, USA
    JAMA Surg 148:76-80. 2013
    ..We hypothesize that similar differences exist in pediatric racial/ethnic minorities because their care is a function of their parents' access. We investigated this issue by examining pediatric injury outcomes in California...
  58. doi request reprint Inpatient safety trends in laparoscopic and open nephrectomy for renal tumours
    Sean P Stroup
    UC San Diego Medical Center, Division of Urology VA San Diego Medical Center Moores UCSD Cancer Center, San Diego, CA 92103, USA
    BJU Int 110:1808-13. 2012
    ..This observation could have implications for patient safety in the setting of diffusion of new surgical techniques...
  59. ncbi request reprint The battle of the sexes: women win out in gastrointestinal surgery
    Carrie Y Peterson
    Department of Surgery, University of California, San Diego, California 92103 8401, USA
    J Surg Res 170:e23-8. 2011
    ..We hypothesize that the physiologic insults of a major abdominal operation are similar to an injury model; therefore, women will have improved outcomes...
  60. doi request reprint Brief tool to measure risk-adjusted surgical outcomes in resource-limited hospitals
    Jamie E Anderson
    Department of Surgery, University of California, San Diego, 200 W Arbor Dr, Ste 8400, San Diego, CA 92103, USA
    Arch Surg 147:798-803. 2012
    ..To develop and validate a risk-adjusted tool with fewer than 10 variables to measure surgical outcomes in resource-limited hospitals...
  61. ncbi request reprint Multiple, simultaneous trauma patients: Are they worse off?
    Angela Shoher
    Division of Trauma Surgery and Surgical Critical Care, Department of Surgery, The Johns Hopkins Medical Institutions, Baltimore, Maryland, USA
    J Trauma 61:611-5. 2006
    ..We hypothesize that trauma patients presenting in clusters of two or more patients within a short time period have worse outcomes...
  62. doi request reprint Mechanism of injury predicts patient mortality and impairment after blunt trauma
    Adil H Haider
    Department of Surgery, Division of Trauma, Johns Hopkins University, School of Medicine, Baltimore, MD 21287, USA
    J Surg Res 153:138-42. 2009
    ..This study analyzed the independent relationship between MOI and mortality and functional outcomes following blunt trauma among adults...
  63. doi request reprint Total laryngectomy: national and regional case volume trends 1998-2008
    Ryan K Orosco
    Department of Surgery, Division of Head and Neck Surgery, University of California San Diego, San Diego, California, USA
    Otolaryngol Head Neck Surg 148:243-8. 2013
    ..A study was undertaken to evaluate national and regional trends in TLs performed over the most recent decade for which data were available and to use multivariate analysis to characterize these trends in more detail...
  64. ncbi request reprint Effect of race and insurance status on presentation, treatment, and mortality in patients undergoing surgery for diverticulitis
    Anne O Lidor
    Department of Surgery, Johns Hopkins Medical Institution, Baltimore, MD, USA
    Arch Surg 143:1160-5; discussion 1165. 2008
    ..To determine the effect of race and insurance status on patient presentation, treatment, and mortality in individuals who underwent surgery for diverticulitis...
  65. doi request reprint Surgical intervention for thoracic outlet syndrome improves patient's quality of life
    David C Chang
    Division of Vascular Surgery, Department of Surgery, Johns Hopkins Medical Institutions, Baltimore, MD 21205, USA
    J Vasc Surg 49:630-5; discussion 635-7. 2009
    ..To assess long-term quality of life outcomes in patients following transaxillary first-rib resection and scalenectomy for thoracic outlet syndrome (TOS)...
  66. ncbi request reprint Mortality in adolescent girls vs boys following traumatic shock: an analysis of the National Pediatric Trauma Registry
    Adil H Haider
    Division of Trauma and Critical Care, Department of Surgery, Johns Hopkins School of Medicine, 600 N Wolfe St, Blalock 688, Baltimore, MD 21287, USA
    Arch Surg 142:875-80; discussion 879-80. 2007
    ..Female sex imparts a survival benefit after traumatic injury in children...
  67. doi request reprint A critical analysis of the American Joint Committee on Cancer (AJCC) staging system for differentiated thyroid carcinoma in young patients on the basis of the Surveillance, Epidemiology, and End Results (SEER) registry
    Hop S Tran Cao
    Department of Surgery, University of California San Diego, San Diego, CA, USA
    Surgery 152:145-51. 2012
    ..In this study, we re-examined the relationship between age, extent of disease, and prognosis by using a large dataset with longer follow-up times...
  68. doi request reprint Pretransplant panel reactive antibodies in human lung transplantation: an analysis of over 10,000 patients
    Ashish S Shah
    Division of Cardiac Surgery, Department of Surgery, Johns Hopkins Medical Institute, Baltimore, Maryland 21287, USA
    Ann Thorac Surg 85:1919-24. 2008
    ..The role of panel reactive antibody (PRA) in lung transplant recipients has not been clearly defined in a large population. We sought to determine how panel reactive antibody level affects survival in lung transplant recipients...
  69. ncbi request reprint Predictors for survival of penetrating trauma using emergency department thoracotomy in an urban trauma center: the Cardiac Instability Score
    Suryanarayana Siram
    Department of Surgery, Howard University College of Medicine, Washington, DC 20060, USA
    J Natl Med Assoc 102:126-30. 2010
    ..This study aims to determine predictors of survival and futility by proposing a scoring scale that measures cardiac instability and its use in predicting survival of victims of penetrating trauma undergoing EDT...
  70. ncbi request reprint Undertriage of elderly trauma patients to state-designated trauma centers
    David C Chang
    Department of Surgery, Johns Hopkins School of Medicine, 600 N Wolfe St, Baltimore, MD 21287, USA
    Arch Surg 143:776-81; discussion 782. 2008
    ..To determine whether age bias is a factor in triage errors...
  71. doi request reprint The relationship of obesity and gender prevalence changes in United States inpatient nephrolithiasis
    Sepehr Nowfar
    University of California, San Diego Medical Center, Department of Surgery, Division of Urology, San Diego, CA 92103 8897, USA
    Urology 78:1029-33. 2011
    ..To review the Nationwide Inpatient Sample database to examine the relationships between obesity, gender, and nephrolithiasis. Recent reports indicate that the prevalence of nephrolithiasis has been increasing, especially among women...
  72. doi request reprint Splenectomy in hereditary spherocytosis: Review of 1,657 patients and application of the pediatric quality indicators
    Fizan Abdullah
    Division of Pediatric Surgery, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland 21287 0005, USA
    Pediatr Blood Cancer 52:834-7. 2009
    ....
  73. doi request reprint Health care system and socioeconomic factors associated with variance in use of sentinel lymph node biopsy for melanoma in the United States
    Karl Y Bilimoria
    Cancer Programs, American College of Surgeons, Department of Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
    J Clin Oncol 27:1857-63. 2009
    ..Guidelines recommend sentinel lymph node biopsy (SLNB) for patients with clinical stage IB/II melanomas, but not clinical stage IA melanoma. This study examines factors associated with SLNB use for clinically node-negative melanoma...
  74. doi request reprint Morbidity and mortality associated with antireflux surgery with or without paraesophogeal hernia: a large ACS NSQIP analysis
    Anne O Lidor
    Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
    Surg Endosc 25:3101-8. 2011
    ..We sought to identify factors associated with increased rates of mortality and morbidity in these patients...
  75. doi request reprint A national analysis of the relationship between hospital volume, academic center status, and surgical outcomes for abdominal hysterectomy done for leiomyoma
    Catherine Juillard
    Department of Surgery, University of California Los Angeles, Los Angeles, CA, USA
    J Am Coll Surg 208:599-606. 2009
    ..To determine whether hospital volume and academic center status affect surgical outcomes in a lower-risk procedure, morbidity and mortality in patients undergoing abdominal hysterectomy for leiomyoma were evaluated...
  76. doi request reprint Rural hospitals face a higher burden of ruptured abdominal aortic aneurysm and are more likely to transfer patients for emergent repair
    Rubie Sue Maybury
    Department of Surgery, Georgetown University Hospital, Washington, DC, USA
    J Am Coll Surg 212:1061-7. 2011
    ..We undertook a study to determine the difference in the risk of ruptured AAA presentation and outcomes after ruptured AAA between rural and urban areas...
  77. pmc Asian race/ethnicity as a risk factor for bile duct injury during cholecystectomy
    Stephanie R Downing
    Department of Surgery, The Johns Hopkins University School of Medicine, 1650 Orleans St, Baltimore, MD 21287, USA
    Arch Surg 145:785-7. 2010
    ..59-3.07; P < .001) cholecystectomies. No other race/ethnicity was identified as a risk factor for BDI. We report a new finding that Asian race/ethnicity is a significant risk factor for BDI in laparoscopic and open cholecystectomies...
  78. doi request reprint The first national examination of outcomes and trends in robotic surgery in the United States
    Jamie E Anderson
    Department of Surgery, University of California, San Diego, CA 92103, USA
    J Am Coll Surg 215:107-14; discussion 114-6. 2012
    ..There are few population-based data describing outcomes of robotic-assisted surgery. We compared outcomes of robotic-assisted, laparoscopic, and open surgery in a nationally representative population database...
  79. pmc Sociodemographic Predictors of Survival in Differentiated Thyroid Cancer: Results from the SEER Database
    Lily E Johnston
    Department of Surgery, University of California San Diego, San Diego, CA 92103, USA
    ISRN Endocrinol 2012:384707. 2012
    ..Recognizing the importance of these factors may enable clinicians to better tailor therapy...
  80. ncbi request reprint Vagus nerve and postinjury inflammatory response
    Carrie Y Peterson
    Department of Surgery, University of California, San Diego, San Diego, CA 92103 8401, USA
    Arch Surg 147:76-80. 2012
    ..To determine whether injured patients who received a vagotomy would have worse outcomes after injury...
  81. ncbi request reprint Simple index to predict likelihood of skilled nursing facility admission after coronary artery bypass grafting among older patients
    David C Chang
    Department of Surgery, Johns Hopkins Hospital, Baltimore, Maryland 21287 4618, USA
    Ann Thorac Surg 84:829-34; discussion 834-5. 2007
    ..To address this concern, we describe an index that predicts a patient's likelihood of admission to a skilled nursing facility (SNF) after CABG...
  82. ncbi request reprint Publication bias in surgery: implications for informed consent
    Dora Syin
    Center for Outcomes Research, Department of Surgery, John Hopkins University School of Medicine, Baltimore, Maryland 21287, USA
    J Surg Res 143:88-93. 2007
    ..However, these results are often from centers of excellence, and as a result the literature mortality rates may not be representative or generalizable...
  83. doi request reprint What constitutes a "high-volume" hospital for pancreatic resection?
    Robert A Meguid
    Department of Surgery, Johns Hopkins School of Medicine, Baltimore, MD 21287, USA
    J Am Coll Surg 206:622.e1-9. 2008
    ..This study aimed to define an objective, evidence-based operative volume threshold associated with improved postoperative outcomes after pancreatic resection...
  84. doi request reprint First rib resection and scalenectomy for chronically occluded subclavian veins: what does it really do?
    Ricardo De Leon
    Division of Vascular Surgery, Department of Surgery, Johns Hopkins Medical Institutions, Baltimore, MD 21205, USA
    Ann Vasc Surg 22:395-401. 2008
    ..This treatment correlates with improvement of their symptoms...
  85. ncbi request reprint Patterns and outcomes among penetrating trauma recidivists: it only gets worse
    Benjamin S Brooke
    Department of Surgery, Division of Trauma and Critical Care, The Johns Hopkins Hospital, Baltimore, Maryland, USA
    J Trauma 61:16-9; discussion 20. 2006
    ..Trauma recidivism accounts for a significant proportion of visits to urban trauma centers. The current study was designed to characterize injury patterns among individual recidivists and analyze their impact on mortality...
  86. ncbi request reprint Development and validation of a risk stratification index to predict death in gastroschisis
    Meghan A Arnold
    Department of Surgery, Johns Hopkins Medical Institutions, Baltimore, MD 21287, USA
    J Pediatr Surg 42:950-5; discussion 955-6. 2007
    ..Development of an accurate risk stratification system to help identify the subset of patients at greatest risk for death may lead to further improvements in outcome...
  87. ncbi request reprint Why should surgeons care about clinical research methodology?
    David C Chang
    Department of Surgery, Johns Hopkins School of Medicine, Baltimore, MD 21287, USA
    J Am Coll Surg 203:827-30. 2006
    ..A low prevalence of high-level clinical studies in the surgical literature has been reported previously. We reviewed a recent sample of surgical publications to assess the current status of clinical research...
  88. doi request reprint Outcomes research in pediatric surgery. Part 2: how to structure a research question
    David C Chang
    Department of Surgery, University of California San Diego School of Medicine, San Diego, CA 92103, USA
    J Pediatr Surg 46:226-31. 2011
    ..The model we present provides the reader with a basic format and research structure to serve as a guide to performing high-quality surgical outcomes research...
  89. ncbi request reprint Preoperative and intraoperative determinants of incisional bulge following retroperitoneal aortic repair
    Susanna L Matsen
    Department of Surgery, Johns Hopkins School of Medicine, Baltimore, MD 21287, USA
    Ann Vasc Surg 20:183-7. 2006
    ..Preoperatively, surgeons should warn obese patients and those requiring large incisions for extensive disease of their increased risk for poor healing. Intraoperatively, surgeons should aim to minimize incision length...
  90. doi request reprint Disparities in urban and rural mastectomy populations : the effects of patient- and county-level factors on likelihood of receipt of mastectomy
    Lisa K Jacobs
    Department of Surgery, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
    Ann Surg Oncol 15:2644-52. 2008
    ..The likelihood of mastectomy in urban and rural patients, and the impact of the different variables on that procedure, is reported...