Research Topics
| D R UrbachSummaryAffiliation: University of Toronto Country: Canada Publications
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Detail Information
Publications
Using patient and physician perspectives to develop a shared decision-making framework for colorectal cancerMarisa Leon Carlyle
Department of Surgery, Toronto General Hospital, Toronto, Ontario, Canada
Implement Sci 4:81. 2009..It will provide a framework that can be used to describe the shared decision-making process and its outcomes, and evaluate strategies to facilitate this process for patients with colorectal cancer...
The efficiency and effectiveness of utilizing diagrams in interviews: an assessment of participatory diagramming and graphic elicitationMuriah J Umoquit
Cancer Services and Policy Research Unit, Cancer Care Ontario, Toronto, ON, Canada
BMC Med Res Methodol 8:53. 2008..The two methods are 'participatory diagramming', where the respondent creates a diagram that assists in their communication of answers, and 'graphic elicitation', where a researcher-prepared diagram is used to stimulate data collection...
Challenges in multidisciplinary cancer care among general surgeons in CanadaAnna R Gagliardi
Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada
BMC Med Inform Decis Mak 8:59. 2008....
Adoption of an innovation to repair aortic aneurysms at a Canadian hospital: a qualitative case study and evaluationNathalie M Danjoux
Department of Health, Policy, Management and Evaluation, University of Toronto, Toronto, Canada
BMC Health Serv Res 7:182. 2007....
Social disparities in the use of colonoscopy by primary care physicians in OntarioBinu J Jacob
Clinical Decision Making and Health Care, Toronto General Hospital, 200 Elizabeth Street, Toronto, Ontario M5G2C4, Canada
BMC Gastroenterol 11:102. 2011..This research was designed to describe long-term trends in the use of colonoscopy by primary care physicians (PCPs) in Ontario, and to determine whether PCP characteristics influence the use of colonoscopy...
Does it matter what a hospital is "high volume" for? Specificity of hospital volume-outcome associations for surgical procedures: analysis of administrative dataDavid R Urbach
Department of Surgery, University of Toronto, 200 Elizabeth Street, 9EN 236A, Toronto, ON M5G 2C4, Canada
BMJ 328:737-40. 2004..To determine whether the improved outcome of a surgical procedure in high volume hospitals is specific to the volume of the same procedure...
Rate of elective cholecystectomy and the incidence of severe gallstone diseaseDavid R Urbach
The Institute for Clinical Evaluative Sciences, University of Toronto, Toronto, Ont
CMAJ 172:1015-9. 2005..We sought to determine whether this increase has resulted in a reduction in the incidence of severe complications of gallstone disease...
Does it matter what a hospital is "high volume" for? Specificity of hospital volume-outcome associations for surgical procedures: analysis of administrative dataD R Urbach
Department of Surgery, University of Toronto, 200 Elizabeth Street, 9EN 236A, Toronto, ON M5G 2C4, Canada
Qual Saf Health Care 13:379-83. 2004..To determine whether the improved outcome of a surgical procedure in high volume hospitals is specific to the volume of the same procedure...
Measuring quality of life after surgeryDavid R Urbach
Department of Surgery, University of Toronto, Ontario, Canada
Surg Innov 12:161-5. 2005....
Short-term health-related quality of life after abdominal surgery: a conceptual frameworkDavid R Urbach
Department of Surgery, University of Toronto and Division of Clinical Decision Making and Health Care, Toronto General Hospital, Toronto, Ontario, Canada
Surg Innov 12:243-7. 2005..A measure of QOL after abdominal surgery should have adequate coverage of these health concepts...
A measure of quality of life after abdominal surgeryDavid R Urbach
Department of Surgery and Health, University of Toronto, Toronto, ON, Canada
Qual Life Res 15:1053-61. 2006..To develop a reliable and valid measure of short-term quality of life after abdominal surgery...
A research agenda for gastrointestinal and endoscopic surgeryD R Urbach
Department of Surgery, University of Toronto, 200 Elizabeth St, Toronto, ON, M5G 2C4, Canada
Surg Endosc 21:1518-25. 2007..The authors sought to develop a list of research questions for which further research was likely to have a major impact on clinical care in the area of gastrointestinal and endoscopic surgery...
Preoperative determinants of an esophageal lengthening procedure in laparoscopic antireflux surgeryD R Urbach
Department of Health Policy, Management and Evaluation, University of Toronto, Room 8 332, 399 Bathurst Street, Toronto, Ontario M5T 258, Canada
Surg Endosc 15:1408-12. 2001..We evaluated risk factors associated with an irreducible GEJ to identify clinical features that were predictive of the need for a Collis gastroplasty in patients undergoing laparoscopic antireflux surgery...
Cohort study of surgical bypass to the gallbladder or bile duct for the palliation of jaundice due to pancreatic cancerDavid R Urbach
Department of Surgery, Toronto General Hospital Research Institute, Ontario, Canada
Ann Surg 237:86-93. 2003..To compare patterns in mortality and the use of subsequent biliary drainage interventions (surgical, endoscopic, and percutaneous) associated with the different types of biliary bypass...
Association of perforation of the appendix with female tubal infertilityD R Urbach
Department of Surgery, University of Toronto, Toronto, Ontario, Canada
Am J Epidemiol 153:566-71. 2001..0, 95% CI: 2.8, 12.8) were significantly associated with tubal infertility in multivariate analysis. These data do not provide substantial evidence that perforation of the appendix is an important risk factor for female tubal infertility...
The effect of patient selection on comorbidity-adjusted operative mortality risk. Implications for outcomes studies of surgical proceduresDavid R Urbach
Department of Surgery, University of Toronto, Toronto, Ontario, Canada
J Clin Epidemiol 55:381-5. 2002....
Incidence of cancer of the pancreas, extrahepatic bile duct and ampulla of Vater in the United States, before and after the introduction of laparoscopic cholecystectomyD R Urbach
Department of Minimally Invasive Surgery and Surgical Research, Legacy Health System, Portland, Oregon, USA
Am J Surg 181:526-8. 2001..Some epidemiologic studies have identified cholecystectomy as a risk factor for pancreatic and biliary cancer...
The surgeon on call is a strong factor determining the use of a laparoscopic approach for appendectomyP Cervini
Minimally Invasive Surgery Program, Division of General Surgery, Toronto Western Hospital, 399 Bathurst Street, Room MP 8-332, Toronto, Ontario M5T 2S8
Surg Endosc 16:1774-7. 2002..001). CONCLUSIONS: The surgeon on call when a patient is admitted is an important factor determining whether a patient will receive a laparoscopic or open appendectomy...
Cost-effective management of common bile duct stones: a decision analysis of the use of endoscopic retrograde cholangiopancreatography (ERCP), intraoperative cholangiography, and laparoscopic bile duct explorationD R Urbach
Department of Minimally Invasive Surgery and Surgical Research, Legacy Health Systems, Portland, OR 97227, USA
Surg Endosc 15:4-13. 2001..If expertise in LCDE is unavailable, selective postoperative ERCP is preferred over routine preoperative ERCP, unless the probability of CBD stones is very high (>80%)...
Quality of life before and after laparoscopic Heller myotomy for achalasiaA Ben-Meir
Department of Minimally Invasive Surgery and Surgical Research, Legacy Health System, 501 N Graham St, Suite 120, Portland, OR 97227, USA
Am J Surg 181:471-4. 2001..0, P = 0.05), bodily pain (12.2, P = 0.01), vitality (13.7, P = 0.02), and social functioning (18.4, P = 0.02). CONCLUSIONS: Most aspects of HRQL improve after a laparoscopic Heller myotomy and partial fundoplication for achalasia...
A decision analysis of the optimal initial approach to achalasia: laparoscopic Heller myotomy with partial fundoplication, thoracoscopic Heller myotomy, pneumatic dilatation, or botulinum toxin injectionD R Urbach
Department of Minimally Invasive Surgery and Surgical Research, Legacy Systems, Portland, Ore, USA
J Gastrointest Surg 5:192-205. 2001..However, the differences are small enough that patient preferences and local expertise should be taken into consideration when tailoring a treatment plan for an individual patient...
Outcomes of laparoscopic herniorrhaphy without fixation of mesh to the abdominal wallY S Khajanchee
Department of Minimally Invasive Surgery and Surgical Research, Legacy Health Systems, 501 N. Graham, Suite 120, Portland, OR 97227, USA
Surg Endosc 15:1102-7. 2001..Large randomized controlled studies are needed to determine whether mesh fixation is truly related to neuropathic complications and the incidence of recurrence...
Laparoscopic antireflux surgery in the elderlyY S Khajanchee
Department of Minimally Invasive Surgery and Surgical Research, Legacy Health System, 501 N. Graham, Suite 120, Portland, OR 97227, USA
Surg Endosc 16:25-30. 2002..CONCLUSION: Laparoscopic antireflux surgery in elderly patients improves acid reflux and appears to be safe and effective as measured by postoperative testing in elderly and young patients...
Laparoscopic hepatic artery infusion pump placementD R Urbach
Department of Minimally Invasive Surgery, Legacy Health System, 501 N Graham, Suite 120, Portland, OR 97227, USA
Arch Surg 136:700-4. 2001..Controlled trials will be required to evaluate the added value of a laparoscopic approach to the placement of the hepatic artery pump...
Conventional models overestimate the statistical significance of volume-outcome associations, compared with multilevel modelsDavid R Urbach
Institute for Clinical Evaluative Sciences, University of Toronto, G Wing Room 140, 2075 Bayview Avenue, Toronto, Ontario M4N 3M5, Canada
J Clin Epidemiol 58:391-400. 2005..To compare the use of conventional statistical models with multilevel regression models in volume-outcome analyses of surgical procedures in an empirical case study...
Differences in operative mortality between high- and low-volume hospitals in Ontario for 5 major surgical procedures: estimating the number of lives potentially saved through regionalizationDavid R Urbach
Department of Surgery, University of Toronto, Toronto, Ont
CMAJ 168:1409-14. 2003..We estimated the absolute number of operative deaths that could potentially be avoided if 5 major surgical procedures in Ontario were restricted to HVHs...
The prevalence of autoimmune disease in patients with esophageal achalasiaJ D Booy
Division of General Surgery, University Health Network, Toronto, Ontario, Canada
Dis Esophagus 25:209-13. 2012..5-5.3). Our findings are consistent with the impression that achalasia's etiology has an autoimmune component. Further research is needed to more conclusively define achalasia as an autoimmune disease...
The effect of intraoperative bupivacaine administration on parenteral narcotic use after laparoscopic appendectomyP Cervini
Minimally Invasive Surgery Program, Division of General Surgery, Toronto Western Hospital, 399 Bathurst Street, Room MP 8-332, Toronto, Ontario M5T 2S8
Surg Endosc 16:1579-82. 2002....
Dedicated minimally invasive surgery suites increase operating room efficiencyT A Kenyon
Department of Minimally Invasive Surgery, Legacy Health Systems, Emanuel Hospital, 2801 N Gantenbein Ave, Portland, OR 97227, USA
Surg Endosc 15:1140-3. 2001..MIS suites integrated monitors and video equipment into the OR on ceiling-mounted columns and moved the controls to a centralized nursing station. The overall effect of this innovation on OR efficiency has not been measured...
The effect of laparoscopy on survival in pancreatic cancerDavid R Urbach
Division of General Surgery, University Health Network, Department of Surgery, University of Toronto, Toronto, Ontario, Canada
Arch Surg 137:191-9. 2002..Exposure to laparoscopy influences survival in patients with unresected pancreatic cancer who have a diagnostic or staging surgical procedure...
The effect of regionalization on outcome in pulmonary lobectomy: a Canadian national studyChristian J Finley
Division of Thoracic Surgery, Toronto General Hospital, Toronto, Ontario, Canada
J Thorac Cardiovasc Surg 140:757-63. 2010..To examine the effect of regionalization of thoracic surgery services in Canada by evaluating change over time in hospital volumes of pulmonary lobectomy and its impact on length of stay and in-hospital mortality...
Association of colonoscopy and death from colorectal cancerNancy N Baxter
Li Ka Shing Knowledge Institute, St Michael s Hospital, University Health Network, University of Toronto, Toronto, Ontario, Canada
Ann Intern Med 150:1-8. 2009..Colonoscopy is advocated for screening and prevention of colorectal cancer (CRC), but randomized trials supporting the benefit of this practice are not available...
Varied definitions of hospital volume did not alter the conclusions of volume-outcome analysesGirish S Kulkarni
Department of Health Policy, Management and Evaluation, University of Toronto, Toronto, Canada
J Clin Epidemiol 62:400-7. 2009..To compare different methods of calculating hospital volume, including approaches designed to account for hospital restructuring, and their impact on volume-outcome analyses...
Azathioprine or ileocolic resection for steroid-dependent terminal ileal Crohn's disease? A Markov analysisErin D Kennedy
Department of Surgery and Medicine, University of Toronto, the Samuel Lunenfield Research Institute, Mount Sinai Hospital, Toronto, Canada
Dis Colon Rectum 47:2120-30. 2004....
Surgeon volumes and selected patient outcomes in cataract surgery: a population-based analysisChaim M Bell
Department of Medicine, University of Toronto, Toronto, Canada
Ophthalmology 114:405-10. 2007..To study the association of annual surgeon volume of cataract procedures with the risk of postoperative adverse events...
Potentially unintended discontinuation of long-term medication use after elective surgical proceduresChaim M Bell
Department of Medicine, University of Toronto, Toronto, Ontario, Canada
Arch Intern Med 166:2525-31. 2006..Transitions between health care settings represent vulnerable periods for medical error. Discontinuation of long-term medication use may occur during discharge from the hospital to the community...
A comparison of diet and exercise therapy versus laparoscopic Roux-en-Y gastric bypass surgery for morbid obesity: a decision analysis modelEmma J Patterson
Department of Minimally Invasive Surgery, Legacy Health System, Portland, OR, USA
J Am Coll Surg 196:379-84. 2003..CONCLUSIONS: In a decision analysis model, laparoscopic gastric bypass surgery for morbid obesity was associated with a substantially longer survival than diet and exercise therapy...
Extended transmediastinal dissection: an alternative to gastroplasty for short esophagusYashodhan S Khajanchee
Department of Minimally Invasive Surgery, Legacy Health System, Portland, OR, USA
Arch Surg 138:735-40. 2003..More liberal application of Collis gastroplasty in these patients is not warranted...
Whither surgery in the treatment of gastroesophageal reflux disease (GERD)?David R Urbach
Department of Surgery, University of Toronto, Ont
CMAJ 170:219-21. 2004
Optimal treatment for severe neurogenic bowel dysfunction after chronic spinal cord injury: a decision analysisJ C Furlan
Spinal Program, Krembil Neuroscience Centre, Toronto Western Hospital, University of Toronto, 399 Bathurst Street, Toronto, Ontario, Canada
Br J Surg 94:1139-50. 2007..This study employed a decision analysis to examine the optimal treatment for bowel management of young individuals with chronic refractory constipation in the setting of chronic SCI...
What is a meant when a laparoscopic surgical procedure is described as "safe"?D Weizman
Minimally Invasive Surgery Program, University of Toronto, 200 Elizabeth Street, Room 10 NU 214, Toronto, ON, Canada, M5G 2C4
Surg Endosc 21:1369-72. 2007..quot; This study aimed to review systematically articles from the past 10 years that judged a laparoscopic technique for colon resection and anastomosis to be "safe."..
Accuracy of administrative health data for the diagnosis of upper gastrointestinal diseasesS R Lopushinsky
Department of Surgery, University of Toronto, 10EN 214, Toronto, ON, Canada, M5G 2C4
Surg Endosc 21:1733-7. 2007..The use of administrative health data is increasingly common for the study of various medical and surgical diseases. The validity of diagnosis codes for the study of benign upper gastrointestinal disorders has not been well studied...
Clinical librarian attendance at general surgery quality of care rounds (Morbidity and Mortality Conference)Elisa Greco
Department of Surgery, University of Toronto, and Toronto General Clinical Hospital, Toronto, Ontario, Canada
Surg Innov 16:266-9. 2009..The clinical librarian program has greatly improved the Quality of Care rounds by aiding in literature searches and quality of up-to-date, evidence-based presentations...
Abdominal Surgery Impact Scale (ASIS) is responsive in assessing outcome following IPAAIndraneel Datta
Dr Zane Cohen Digestive Diseases Clinical Research Center, Mount Sinai Hospital, Mount Sinai Hospital, Room 449, 600 University Avenue, Toronto, Ontario, M5G 1X5, Canada
J Gastrointest Surg 13:687-94. 2009....
Regional variation in surgery for gastroesophageal reflux disease in OntarioSteven R Lopushinsky
Department of Surgery, University of Toronto, Ontario, Canada
Surg Innov 14:35-40. 2007..0 to 28.7 per 100,000 persons. Significant regional variation exists for antireflux surgery across Ontario, suggesting that its appropriate role in the management of GERD remains ill-defined...
A measure of disease-specific health-related quality of life for achalasiaDavid R Urbach
Department of Surgery, University of Toronto, Toronto, Ontario, Canada
Am J Gastroenterol 100:1668-76. 2005..This measure is appropriate for use as an outcome measure in clinical trials and other evaluative studies on the effectiveness of treatment for achalasia...
How are decisions to introduce new surgical technologies made? Advanced laparoscopic surgery at a Canadian community hospital: A qualitative case study and evaluationBharat Sharma
Division of Clinical Decision Making and Health Care, University Health Network, Toronto, Ontario, Canada
Surg Innov 13:250-6. 2006..The process for making decisions about the adoption of new surgical technologies can be improved...
Users' guide to the surgical literature. Case-control studies in surgical journalsAlexandra Mihailovic
Department of Surgery, Toronto General Hospital Research Institute, Toronto, Ont
Can J Surg 48:148-51. 2005..2, CI 0.1-0.7) than other types of studies, such as those focusing on risk factors for disease. CONCLUSIONS: The term "case-control study" is frequently misused in the surgical literature...
Pneumatic dilatation and surgical myotomy for achalasiaSteven R Lopushinsky
Department of Surgery, University of Toronto, Toronto, Ontario
JAMA 296:2227-33. 2006..This difference is attributable to the use of subsequent pneumatic dilatation rather than surgical procedures...
How are volume-outcome associations related to models of health care funding and delivery? A comparison of the United States and CanadaDavid R Urbach
Institute for Clinical Evaluative Sciences, 2075 Bayview Avenue, G Wing, Toronto, Ontario M4N 3M5, Canada
World J Surg 29:1230-3. 2005..By promoting competition between hospitals and providers, market-based models may exacerbate existing variations in the quality of hospital care...
Longer wait times increase overall mortality in patients with bladder cancerGirish S Kulkarni
Department of Health Policy, Management and Evaluation, University Health Network, Toronto, Canada
J Urol 182:1318-24. 2009..We used population level data to determine the impact of extended wait times on the survival of patients who underwent radical cystectomy for bladder cancer...
An evaluation of the relationship between lymph node number and staging in pT3 colon cancer using population-based dataNancy N Baxter
Department of Surgery and Keenan Research Centre in the Li Ka Shing Knowledge Institute of St Michael s Hospital, University of Toronto, Ontario, Canada
Dis Colon Rectum 53:65-70. 2010..The number of lymph nodes examined has been proposed as a quality benchmark for colon cancer surgery, although it is unknown whether this strategy reduces understaging...
Laparoscopic adrenalectomy for the management of benign and malignant adrenal tumorsJamie Cyriac
University of Toronto, Toronto, Ontario, Canada
Expert Rev Med Devices 3:777-86. 2006..Due to the fact that malignancy cannot be excluded with certainty in some patients with cortical adenomas, it is expected that the rate of laparoscopic adrenalectomy will continue to increase...
Increasing hospital admission rates for urological complications after transrectal ultrasound guided prostate biopsyRobert K Nam
Division of Urology, Sunnybrook Research Institute, Toronto, Ontario, Canada
J Urol 183:963-8. 2010..Transrectal ultrasound guided prostate biopsy is widely used to confirm the diagnosis of prostate cancer. The technique has been associated with significant morbidity in a small proportion of patients...
Long-term survival in young adults with colorectal cancer: a population-based studyShawn S Forbes
Department of Surgery, University of Toronto, Toronto, Ontario, Canada
Dis Colon Rectum 53:973-8. 2010..This study compares the long-term survival of young adults with colorectal cancer who lived a minimum of 5 years after diagnosis with a cancer-free control population...
Laparoscopic Roux-en-Y gastric bypass for severe gastroesophageal reflux after vertical banded gastroplastyRichard D Bloomberg
Minimally Invasive Surgery Program, Toronto Western Hospital, Department of Surgery, University of Toronto, Toronto, ON, Canada
Obes Surg 12:408-11. 2002..Laparoscopic conversion of a VBG to RYGBP is feasible, and may confer the benefits of other minimally invasive abdominal procedures to this high-risk patient group...
Attitudes of patients and care providers toward a surgical site marking policyAmanda E Goldberg
Division of Clinical Decision Making and Health Care, Toronto General Hospital, Department of Surgery, University of Toronto, Toronto, Ontario, Canada
Surg Innov 16:249-57. 2009..Little is known about what health care providers and patients think about official surgical site marking policy...
Patient-centered measures for achalasiaJulie L Harnish
Division of Clinical Decision Making, Toronto General Hospital Research Institute, 200 Elizabeth Street, 13 EN 232B, M5G 2C4, Toronto, Ontario, Canada
Surg Endosc 22:1290-3. 2008..Various instruments may be used to measure health-related quality of life in patients with achalasia...
Effect of surgeon on outcome of antireflux surgeryPavi Singh Kundhal
Division of General Surgery, University Health Network, Toronto, Ontario, Canada
Surg Endosc 21:902-6. 2007..We sought to determine whether subjective outcomes one or more years after antireflux surgery are affected by the operating surgeon...
The treatment and prognosis of Hürthle cell follicular thyroid carcinoma compared with its non-Hürthle cell counterpartPhilip I Haigh
Department of Surgery, Kaiser Permanente Los Angeles Medical Center, CA 90027, USA
Surgery 138:1152-7; discussion 1157-8. 2005..This population study compared the treatment and prognosis of Hürthle cell follicular thyroid carcinoma (HCFC) and non-HCFC...
Underuse of wide excision for primary cutaneous melanoma in the United StatesPhilip I Haigh
Department of Surgical Oncology, Kaiser Permanente Los Angeles Medical Center, Los Angeles, California 90027, USA
Am Surg 70:942-6. 2004..Use of WEX is associated with thicker melanomas and younger patients. Use of WEX has decreased over time, despite results from three randomized trials supporting its use...
Laparoscopic-assisted surgery for colon cancerDavid R Urbach
JAMA 287:1938; author reply 1939. 2002
Factors affecting the number of lymph nodes retrieved in colorectal cancer specimensMichelle A Ostadi
Departments of Surgery, University of Toronto, Toronto, Ontario, Canada
Surg Endosc 21:2142-6. 2007..This study aims to understand the factors affecting the number of lymph nodes identified in surgical colorectal cancer specimens...
AMES prognostic index and extent of thyroidectomy for well-differentiated thyroid cancer in the United StatesPhilip I Haigh
Department of Surgical Oncology, Kaiser Permanente Los Angeles Medical Center, Los Angeles, Calif, USA
Surgery 136:609-16. 2004..Regional lymph node metastasis, not an AMES criterion, increased the likelihood of TT. Some components of AMES risk-group classification are used by surgeons to choose the extent of thyroidectomy...
Risk factors for bile duct injury during laparoscopic cholecystectomy: a case-control studyRamin Kholdebarin
Division of Clinical Decision Making and Health Care, Toronto General Hospital
Surg Innov 15:114-9. 2008..No other characteristics were independent risk factors for bile duct injury. Failure to identify the cystic duct and the emergency surgery are independent risk factors for bile duct injury...
Volume and outcome in healthcare: implications for health policyDavid R Urbach
Institute for Clinical Evaluative Sciences, Toronto
Healthc Q 7:22-3. 2004
Reducing variation in surgical careDavid R Urbach
BMJ 330:1401-2. 2005
Extent of thyroidectomy is not a major determinant of survival in low- or high-risk papillary thyroid cancerPhilip I Haigh
Department of Surgical Oncology, Kaiser Permanente Los Angeles Medical Center, 4760 Sunset Boulevard, Los Angeles, California 90027, USA
Ann Surg Oncol 12:81-9. 2005..The optimal extent of thyroidectomy for papillary thyroid cancer (PTC) is controversial. Our objective was to evaluate the effect of total thyroidectomy or partial thyroidectomy on survival in low- and high-risk patients...
