Research Topics
Species | Gregory S CooperSummaryAffiliation: Case Western Reserve University Country: USA Publications
| Collaborators
|
Detail Information
Publications
The utility of Medicare claims data for measuring cancer stageG S Cooper
Department of Medicine, Case Western Reserve University, Cleveland, OH, USA
Med Care 37:706-11. 1999..The validity of using claims data for measuring tumor stage, one of the most important determinants of choice of therapy and long-term survival, is unknown...- Are readmissions to the intensive care unit a useful measure of hospital performance?G S Cooper
Division of Gastroenterology, University Hospitals of Cleveland, Case Western Reserve University School of Medicine, OH 44106, USA
Med Care 37:399-408. 1999..Although patients readmitted to intensive care units (ICUs) typically have poor outcomes, ICU readmission rates have not been studied as a measure of hospital performance... - Diagnosis and treatment of gastroesophageal reflux disease in Ohio Medicaid patients: practice patterns and temporal trendsGregory S Cooper
Department of Medicine, University Hospitals of Cleveland, Department of Epidemiology and Biostatistics, Case Western Reserve University School of Medicine, Cleveland, OH, USA
Pharmacoepidemiol Drug Saf 13:21-7. 2004..There is a paucity of data about the use of procedures and prescription medications in the treatment of gastroesophageal reflux disease (GERD) in actual clinical practice... - Use of Medicare claims data to measure county-level variation in breast carcinoma incidence and mammography ratesGregory S Cooper
Department of Medicine, Cancer Research Center, Case Western Reserve University, Cleveland, OH 44106, USA
Cancer Detect Prev 26:197-202. 2002..National-level population-based data about breast carcinoma incidence and its association with screening mammography are currently not available... - Use of SEER-Medicare data for measuring cancer surgeryGregory S Cooper
Department of Medicine, Case Western Reserve University, Cleveland, Ohio, USA
Med Care 40:IV-43-8. 2002..The accuracy and completeness of the SEER-Medicare data for measuring cancer-related therapy have not been extensively evaluated... - Association of prediagnosis endoscopy with stage and survival in adenocarcinoma of the esophagus and gastric cardiaGregory S Cooper
Division of Gastroenterology, University Hospitals of Cleveland, Cleveland, Ohio 44106, USA
Cancer 95:32-8. 2002..However, the actual use and clinical impact of upper gastrointestinal endoscopy in screening and surveillance for Barrett esophagus are unknown... - The delivery of preventive services for patient symptomsG S Cooper
Division of Gastroenterology, University Hospitals of Cleveland, Case Western Reserve University, Cleveland, Ohio 44106 5066, USA
Am J Prev Med 21:177-81. 2001.... - Determination of county-level prostate carcinoma incidence and detection rates with Medicare claims dataG S Cooper
Department of Medicine and the Cancer Research Center, Case Western Reserve University, Cleveland, Ohio, USA
Cancer 92:102-9. 2001..The availability of such data could identify those regions with a disproportionately high cancer incidence as well as the population-level association between prostate carcinoma detection and incidence... - The sensitivity of Medicare claims data for case ascertainment of six common cancersG S Cooper
Department of Medicine, Case Western Reserve University, Cleveland, OH, USA
Med Care 37:436-44. 1999..Although Medicare claims data have been used to identify cases of cancer in older Americans, there are few data about their relative sensitivity... - Agreement of Medicare claims and tumor registry data for assessment of cancer-related treatmentG S Cooper
Department of Medicine, Case Western Reserve University, Cleveland, Ohio, USA
Med Care 38:411-21. 2000..Although health claims data are increasingly used in evaluating variations in patterns of cancer care and outcomes, little is known about the comparability of these data with tumor registry information... - Design and implementation of an inpatient disease management programG S Cooper
Department of Medicine, University Hospitals of Cleveland and Case Western Reserve University School of Medicine, Cleveland, OH, USA
Am J Manag Care 6:793-801. 2000..To describe the development and implementation of an inpatient disease management program... - Failure to screen: predictors and burden of emergency colorectal cancer resectionJessica C Diggs
Department of Epidemiology and Biostatistics, School of Medicine, Case Western Reserve University, 10900 Euclid Ave, Cleveland, OH 44106 4945, USA
Am J Manag Care 13:157-64. 2007..To evaluate predictors and burden of emergency colorectal cancer resection (E-CCR)... - The sensitivity of Medicare data for identifying incident cases of invasive melanoma (United States)David A Barzilai
Skin Diseases Research Center, University Hospitals of Cleveland, Case Western Reserve University, Cleveland OH 44106, USA
Cancer Causes Control 15:179-84. 2004..The completeness of Medicare claims for identifying patients with melanoma for purposes of conducting population-based studies of melanoma is unknown... 
Descriptive epidemiology of esophageal carcinoma in the Ohio Cancer RegistryLinda C Cummings
Division of Gastroenterology, Department of Medicine, University Hospitals Case Medical Center, 11100 Euclid Avenue, Cleveland, OH 44106 5066, USA
Cancer Detect Prev 32:87-92. 2008..Other aims were to evaluate the impact of race, age, gender, and histology on presenting stage, and to describe tobacco use history in EAC as documented in a cancer registry...
Immediate unprepared hydroflush colonoscopy for severe lower GI bleeding: a feasibility studyAparna Repaka
Division of Gastroenterology and Liver Disease, Digestive Health Institute, University Hospitals Case Medical Center and Case Western Reserve University, Cleveland, Ohio 44106, USA
Gastrointest Endosc 76:367-73. 2012....- Receipt of previous diagnoses and endoscopy and outcome from esophageal adenocarcinoma: a population-based study with temporal trendsGregory S Cooper
Division of Gastroenterology, Department of Medicine, University Hospitals Case Medical Center, 11100 Euclid Avenue, Cleveland, OH 44106 5066, USA
Am J Gastroenterol 104:1356-62. 2009..There are only limited data regarding the use, effectiveness, and temporal trends of this strategy... - Colorectal cancer screening in the elderly population: disparities by dual Medicare-Medicaid enrollment statusSiran M Koroukian
Department of Epidemiology and Biostatistics, School of Medicine, Case Western Reserve University, Cleveland, OH 44106-4945, USA
Health Serv Res 41:2136-54. 2006..Future studies should evaluate the contribution of comorbidity and low socioeconomic status to these disparities... - Success and shortcomings of a clinical care pathway in the management of acute nonvariceal upper gastrointestinal bleedingPatrick R Pfau
Division of Gastroenterology, Department of Medicine, Quality Center, University Hospitals of Cleveland, Case Western Reserve University, Cleveland, Ohio 44106-5066, USA
Am J Gastroenterol 99:425-31. 2004..However, there are significant limitations and barriers to the overall effectiveness of such a pathway in actual clinical practice... - Use of preventive services by Medicare fee-for-service beneficiaries: does spillover from managed care matter?Siran M Koroukian
Department of Epidemiology and Biostatistics, School of Medicine, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH 44106 4945, USA
Med Care 43:445-52. 2005..However, the extent to which MCA is associated with the use of cancer screening by fee-for-service beneficiaries (FFS) is unclear... - Survival after hepatic resection in metastatic colorectal cancer: a population-based studyLinda C Cummings
Division of Gastroenterology, Department of Medicine, University Hospitals Case Medical Center, Cleveland, Ohio 44106, USA
Cancer 109:718-26. 2007..For the current study, a population-based database was used to compare the survival of patients with liver metastases from colorectal cancer who did and did not undergo hepatectomy... - Laparoscopic versus open colectomy for colon cancer in an older population: a cohort studyLinda C Cummings
Division of Gastroenterology and Liver Disease, Department of Medicine, University Hospitals Case Medical Center, 11100 Euclid Avenue, Mailstop 5066, Cleveland, Ohio 44106 5066, USA
World J Surg Oncol 10:31. 2012..The goals of this cohort study were to identify predictors of laparoscopic colectomy in an older population in the United States and to compare short-term and long-term outcomes... - Management of malignant colonic polyps: a population-based analysis of colonoscopic polypectomy versus surgeryGregory S Cooper
Division of Gastroenterology, University Hospitals Case Medical Center, Cleveland, Ohio 44106 5066, USA
Cancer 118:651-9. 2012..The management of colon polyps containing invasive carcinoma includes surgical resection or colonoscopic polypectomy. To date, there are very limited population-based data comparing outcomes with the 2 management approaches... - Cancer stage comparison between dual Medicare-Medicaid eligibles using Medicaid as a supplemental health insurance program and low-income nondualsSiran M Koroukian
Department of Epidemiology and Biostatistics, School of Medicine, Case Western Reserve University, Cleveland, Ohio 44106, USA
J Public Health Manag Pract 17:479-91. 2011.... - Receipt of colorectal testing prior to colorectal carcinoma diagnosisGregory S Cooper
Division of Gastroenterology, University Hospitals of Cleveland, Cleveland, Ohio 44106 5066, USA
Cancer 103:696-701. 2005..In addition, the association of disease stage at the time of diagnosis with previous procedure use has not been studied previously at a population level... - The utility of administrative data for measuring adherence to cancer surveillance care guidelinesGregory S Cooper
Case Western Reserve University, Cleveland, Ohio 44106 5066 and Henry Ford Health System, Detroit, Michigan, USA
Med Care 45:66-72. 2007..Administrative data represent an alternative approach that may encompass larger numbers of patients with relatively low incremental costs... - Ability of Medicaid claims data to identify incident cases of breast cancer in the Ohio Medicaid populationSiran M Koroukian
Department of Epidemiology and Biostatistics, Case Western Reserve University, Cleveland, OH 44106-4945, USA
Health Serv Res 38:947-60. 2003..The higher PPV obtained in the presence of procedure codes, in addition to diagnosis codes, will help researchers to correctly identify incident cases of breast cancer using Medicaid claims data... - EUS and survival in patients with pancreatic cancer: a population-based studySaowanee Ngamruengphong
Division of Gastroenterology, Mayo Clinic Arizona, Scottsdale, Arizona 85259, USA
Gastrointest Endosc 72:78-83, 83.e1-2. 2010..There is no direct evidence that EUS improves patient outcome... - Prevalence and predictors of interval colorectal cancers in medicare beneficiariesGregory S Cooper
Division of Gastroenterology, University Hospitals Case Medical Center, Cleveland, Ohio 44106 5066, USA
Cancer 118:3044-52. 2012..After a colonoscopy that is negative for cancer, a subset of patients may be diagnosed with colorectal cancer, also termed interval cancer. The frequency and predictors have not been well studied in a population-based US cohort... - A comparison of epidural analgesia and traditional pain management effects on survival and cancer recurrence after colectomy: a population-based studyKenneth C Cummings
Department of General Anesthesiology, Anesthesiology Institute, Cleveland Clinic, Cleveland, Ohio 44195, USA
Anesthesiology 116:797-806. 2012..This study compared survival and cancer recurrence rates for resection of colorectal cancer between patients who received perioperative epidurals and those who did not... - Endoscopic ultrasonography and prognosis of esophageal cancerAnanya Das
Division of Gastroenterology, Mayo Clinic Scottsdale, Scottsdale, Arizona, USA
Clin Gastroenterol Hepatol 4:695-700. 2006..Our aim was to study the association of receipt of EUS and overall survival in a cohort of patients with esophageal cancer... - Examining the characteristics of unstaged colon and rectal cancer casesJulie L Worthington
Division of Gastroenterology, Case Western Reserve University, Cleveland, OH 44106 4952, USA
Cancer Detect Prev 32:251-8. 2008..The objective of the study was to identify which stage components were missing, to characterize and to identify predictors of unstaged cancer, and to evaluate prognosis of unstaged in colon and rectal cancer patients... - The yield of bleeding scans in acute lower gastrointestinal hemorrhageGregory D Olds
Division of Gastroenterology, Department of Medicine, University Hospitals of Cleveland, Case Western Reserve University, Cleveland, OH 44106-5066, USA
J Clin Gastroenterol 39:273-7. 2005..Objective selection criteria such as number of units of packed red blood cells transfused prior to obtaining the scan may increase the overall yield... - Correlation of EUS measurement with pathologic assessment of neoadjuvant therapy response in esophageal carcinomaJoseph Willis
Department of Pathology, University Hospitals of Cleveland/Case Western Reserve University, Cleveland, Ohio 44106, USA
Gastrointest Endosc 55:655-61. 2002..001). EUS had a positive predictive value of 80% for pathologic tumor regression. CONCLUSIONS: Measurement of tumor size by EUS is a reliable clinical method for assessing pathologic tumor regression before surgery... - Receipt of guideline-recommended follow-up in older colorectal cancer survivors : a population-based analysisGregory S Cooper
Division of Gastroenterology, University Hospitals Case Medical Center, Cleveland, Ohio 44106 5066, USA
Cancer 113:2029-37. 2008..The actual adherence to these guidelines as well as the potential overuse of testing in routine practice has not been well studied... - Prediction of outcome in acute lower-gastrointestinal haemorrhage based on an artificial neural network: internal and external validation of a predictive modelAnanya Das
Division of Gastroenterology, Department of Medicine, University Hospitals of Cleveland, Case Western Reserve University, Cleveland, OH 44106 5066, USA
Lancet 362:1261-6. 2003..We investigated whether ANN models using information available during triage could predict clinical outcome in patients with this disorder... - Colorectal screening after polypectomy: a national survey study of primary care physiciansVikram Boolchand
University Hospitals of Cleveland, Case Western Reserve University, Cleveland, Ohio, USA
Ann Intern Med 145:654-9. 2006..Recommendations by primary care physicians for colorectal screening after polypectomy will influence rates of colonoscopy in open-access systems that do not require consultation by a gastroenterologist before colonoscopy... - Temporal trend in relative risk of second primary colorectal cancerAnanya Das
Division of Gastroenterology, Mayo Clinic Scottsdale, Scottsdale, Arizona 85259, and Division of Gastroenterology, Case Western Reserve University School of Medicine, Cleveland, OH, USA
Am J Gastroenterol 101:1342-7. 2006..These subsequent cancers are being diagnosed at an earlier stage. Increased surveillance may be one of the factors contributing to this temporal difference... - Effectiveness of open-access endoscopy in routine primary-care practiceRoger J Charles
The Division of Gastroenterology, University Hospitals of Cleveland, Case Western Reserve University, Ohio 44106, USA
Gastrointest Endosc 57:183-6. 2003..However, documentation of communication of the results of endoscopy with the patient can be improved... - Patient-rated importance and receipt of information for colorectal cancer screeningSusan A Flocke
Case Western Reserve University, Cleveland, Ohio, USA
Cancer Epidemiol Biomarkers Prev 20:2168-73. 2011..This study examines and compares both patient rated importance and physician communication of key information elements about CRC screening during annual physical examinations... - Outpatient management of nonvariceal upper gastrointestinal hemorrhage: unexpected mortality in Medicare beneficiariesGregory S Cooper
Division of Gastroenterology, University Hospitals Case Medical Center, Cleveland, Ohio 44106 5066, USA
Gastroenterology 136:108-14. 2009..However, the true prevalence and outcomes of this practice have not been well evaluated in population-based studies... - Association of ampullary and colorectal malignanciesAnanya Das
Division of Gastroenterology, University Hospitals of Cleveland, Case Western Reserve University, Cleveland, Ohio 44106, USA
Cancer 100:524-30. 2004..These findings suggest that ampullary and colorectal malignancies share common environmental and/or genetic risk factors... - Use of guideline recommended follow-up care in cancer survivors: routine or diagnostic indications?Gregory S Cooper
Division of Gastroenterology and Comprehensive Cancer Center, Case Western Reserve University, Cleveland, Ohio 44106 5066, USA
Med Care 44:590-4. 2006..After potentially curative cancer treatment, patients may receive procedures for routine monitoring for recurrence or for evaluation of symptoms or signs... - Geographic variation among Medicare beneficiaries in the use of colorectal carcinoma screening proceduresGregory S Cooper
Division of Gastroenterology, University Hospitals of Cleveland, Cleveland, Ohio 044106-5066, USA
Am J Gastroenterol 99:1544-50. 2004..The etiology of the differences is not clear, but the correlation in the rates of selected procedures suggests the presence of local practice patterns... - Association of insulin and insulin-like growth factors with Barrett's oesophagusKatarina B Greer
Division of Gastroenterology and Liver Disease, University Hospitals Case Medical Center, Cleveland, Ohio, USA
Gut 61:665-72. 2012..The relationship of insulin, IGF-1 and IGF binding proteins (IGFBP) with Barrett's oesophagus (BO) has not been well examined... - The polyp detection rate of colonoscopy: a national study of Medicare beneficiariesGregory S Cooper
Division of Gastroenterology, Department of Medicine, University Hospitals of Cleveland, Case Western Reserve University School of Medicine, Cleveland, Ohio 44106 5066, USA
Am J Med 118:1413. 2005..These data may be informative in predicting resource allocation for therapeutic procedures associated with colonoscopy. Future studies should determine the use and yield of serial colonoscopies for polyp surveillance... - Colorectal cancer screening: update for 2011Linda C Cummings
Department of Medicine, Division of Gastroenterology, University Hospitals Case Medical Center, Cleveland, OH, USA
Semin Oncol 38:483-9. 2011..In addition, other new modalities such as computed tomography colonography (CTC), capsule endoscopy, fecal immunochemical tests, and fecal DNA tests may offer less invasive screening options for patients who decline colonoscopy... - Underuse of colorectal cancer screening in a cohort of Medicare beneficiariesGregory S Cooper
Division of Gastroenterology, University Hospitals Case Medical Center, Cleveland, Ohio 44106 5066, USA
Cancer 112:293-9. 2008..To the authors' knowledge, few population-based studies to date have considered the serial use of colorectal cancer screening tests, which are usually recommended at specific intervals... - Temporal trends in colorectal procedure use after colorectal cancer resectionGregory S Cooper
Division of Gastroenterology, University Hospitals of Cleveland and the Department of Epidemiology and Biostatistics and the Comprehensive Cancer Center, Case Western Reserve University, Cleveland, Ohio, USA
Gastrointest Endosc 64:933-40. 2006..Importantly, despite guideline recommendations and Medicare reimbursement, 25% of patients who undergo curative treatment do not receive surveillance examinations and this was unchanged over time... - Gastroesophageal reflux disease-associated esophagitis induces endogenous cytokine production leading to motor abnormalitiesFlorian Rieder
Division of Gastroenterology, University Hospitals of Cleveland, Case Western Reserve University School of Medicine, Cleveland, Ohio
Gastroenterology 132:154-65. 2007.... - Con: screening colonoscopy in the extreme elderly is not a wise choiceGregory S Cooper
Medicine Oncology and Epidemiology and Biostatistics Case Western Reserve University Cleveland, Ohio, USA
Am J Gastroenterol 101:1715-7; discussion 1717-8. 2006 - Geographic and patient variation in receipt of surveillance procedures after local excision of cutaneous melanomaDavid A Barzilai
Department of Epidemiology and Biostatistics and Skin Disease Research Center, University Hospitals of Cleveland, and Case Western Reserve University, Cleveland, Ohio 44106, USA
J Invest Dermatol 122:246-55. 2004..Further studies are needed to determine the etiology and impact of such disparities, and the influence of surveillance procedures on morbidity and mortality... - Racial disparities in the use of and indications for colorectal procedures in Medicare beneficiariesGregory S Cooper
Division of Gastroenterology, University Hospitals of Cleveland, 11100 Euclid Avenue, Cleveland, OH 44106 5066, USA
Cancer 100:418-24. 2004..African Americans are diagnosed more frequently with colorectal carcinoma at a later stage compared with Caucasians. One potential reason for the disparity is a lower rate of screening examinations... - Use and impact of early endoscopy in elderly patients with peptic ulcer hemorrhage: a population-based analysisGregory S Cooper
Division of Gastroenterology, University Hospitals, Case Medical Center, Cleveland, Ohio 44106 5066, USA
Gastrointest Endosc 70:229-35. 2009..However, the use and outcomes have not been studied in a national, U.S.-based sample... - Editorial: Detection of small polyps: much ado about nothing?Linda C Cummings
Am J Gastroenterol 105:2586-7. 2010..Because of incomplete understanding of the natural history of diminutive adenomas, further study is needed to determine the long-term impact of the use of CTC for colorectal cancer screening... - Patient tolerance and acceptance of unsedated ultrathin esophagoscopyAshley L Faulx
Division of Gastroenterology, University Hospitals of Cleveland, Case Western Reserve University, Cleveland, Ohio 44106, USA
Gastrointest Endosc 55:620-3. 2002..Anxiety assessment by the POMS-SF T/A can identify patients willing to undergo UUE. Patients who choose transoral UUE may be more willing to repeat the procedure... - A prospective evaluation of outcome in patients referred for PEG placementKenji Kobayashi
Division of Gastroenterology, University Hospitals of Cleveland, Case Western Reserve University, Cleveland, Ohio 44106-5066, USA
Gastrointest Endosc 55:500-6. 2002..Careful consideration of predictive factors of survival may improve patient selection for feeding PEG placement... - Artificial neural network as a predictive instrument in patients with acute nonvariceal upper gastrointestinal hemorrhageAnanya Das
Divisions of Gastroenterology, Mayo Clinic Arizona, Scottsdale, Arizona, USA
Gastroenterology 134:65-74. 2008..Triage of patients with acute upper gastrointestinal hemorrhage (UGIH) has traditionally required urgent upper endoscopy. The aim of this study is to evaluate the use of artificial neural network for nonendoscopic triage... - Measuring breast, colorectal, and prostate cancer screening with medicare claims dataJean L Freeman
Sealy Center on Aging, University of Texas Medical Branch, Galveston, Texas 77555 0460, USA
Med Care 40:IV-36-42. 2002..Medicare claims may be a useful source of data when screening older populations, but they are limited in terms of completeness and the ability to distinguish screening tests from those provided for diagnosis or surveillance... - Studying radiation therapy using SEER-Medicare-linked dataBeth A Virnig
Division of Health Services Research and Policy, University of Minnesota, Minneapolis, Minnesota 55455, USA
Med Care 40:IV-49-54. 2002..Numerous studies have used the SEER or Medicare data to assess the use of radiation therapy. However, the completeness of these data has not been evaluated... - Endoscopic screening and surveillance for Barrett's esophagus: can claims data determine its effectiveness?Gregory S Cooper
Gastrointest Endosc 57:914-6. 2003 - Utility of the SEER-Medicare data to identify chemotherapy useJoan L Warren
Applied Research Program, National Cancer Institute, Bethesda, Maryland 20892 7344
Med Care 40:IV-55-61. 2002..However, the validity and completeness of these data as a source of information has not been established... - Colonoscopy: a tarnished gold standard?Gregory S Cooper
Gastroenterology 132:2588-90. 2007