Research Topics
| Gregory CooperSummaryAffiliation: Case Western Reserve University Country: USA Publications
Research Grants
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Detail Information
Publications
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...
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...- 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... 
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...- 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... - 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... - Primary care physician attitudes toward endoscopic screening for GERD symptoms and unsedated esophagoscopyVikram Boolchand
Department of Medicine, University Hospitals of Cleveland, Case Western Reserve University, Cleveland, Ohio, USA
Gastrointest Endosc 63:228-33. 2006..Other risk factors for BE, such as gender and age, do not appear to be important determinants for endoscopic referral. Further evaluation of UE as a mechanism to increase screening for BE in primary care patients is merited... - Prospective evaluation of 4-mm diameter endoscopes for esophagoscopy in sedated and unsedated patientsAndrew Catanzaro
Division of Gastroenterology, University Hospitals of Cleveland, Case Western Reserve University School of Medicine, Cleveland, Ohio 44106, USA
Gastrointest Endosc 57:300-4. 2003..Given the current state of endoscopic technology, a minimum diameter of 4 mm is required for satisfactory esophageal imaging... - The changing landscape of practice patterns regarding unsedated endoscopy and propofol use: a national Web surveyAshley L Faulx
Division of Gastroenterology, Department of Medicine, University Hospitals of Cleveland, Ohio, USA
Gastrointest Endosc 62:9-15. 2005..In contrast, propofol sedation has already gained acceptance in the community, and the routine use of propofol in endoscopy units will likely increase in the future... - Accuracy of a narrow-diameter battery-powered endoscope in sedated and unsedated patientsAndrew Catanzaro
Division of Gastroenterology, University Hospitals of Cleveland, Case Western Reserve University, Cleveland, Ohio 44106-1736, USA
Gastrointest Endosc 55:484-7. 2002..1-mm endoscope is substantially inferior to standard EGD. Thus, the battery-powered endoscope would not be useful for screening patients for Barrett's esophagus or varices unless improvements in optical quality and visualization are made... - 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)... - 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... - 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... - 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... - 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... - 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 - 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... - 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... - 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... - Mycobacterium other than tuberculosis (MOTT) infection: an emerging disease in infliximab-treated patientsEdsel Maurice T Salvana
Division of Infectious Diseases and HIV Medicine, Department of Medicine, Case Western Reserve University and University Hospitals Case Medical Center, 11100 Euclid Avenue, Cleveland, OH 44106 5083, USA
J Infect 55:484-7. 2007.... - 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... - 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... - 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... - 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... - 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... - 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... - 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... - 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... - 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... - 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... - 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... - 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... - 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... - 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... - 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... - 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... - 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... - Colonoscopy: a tarnished gold standard?Gregory S Cooper
Gastroenterology 132:2588-90. 2007 - Endoscopic screening and surveillance for Barrett's esophagus: can claims data determine its effectiveness?Gregory S Cooper
Gastrointest Endosc 57:914-6. 2003 - 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... - 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... - 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...
Research Grants
- CLAIMS DATA TO MEASURE CANCER SURVEILLANCE PROCEDURESGregory Cooper; Fiscal Year: 2001..abstract_text> ..
- Large Database Research for Cancer Prevention & ControlGregory Cooper; Fiscal Year: 2006..abstract_text> ..
- Training Program in Academic GastroenterologyGregory Cooper; Fiscal Year: 2006..After that, 1 or 2 subsequent years may be offered to selected trainees, to be supported by other individual or institutional training grants, or grants to which the trainee will apply during his/her official training period. ..
- Colonoscopy: Practice Patterns and LimitationsGregory S Cooper; Fiscal Year: 2010....