Research Topics
| C W KoSummaryAffiliation: University of Washington Country: USA Publications
Research Grants
| Collaborators
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Detail Information
Publications
Apolipoprotein E genotype and the risk of gallbladder disease in pregnancyC W Ko
Department of Medicine, University of Washington, Seattle, WA 98195, USA
Hepatology 31:18-23. 2000..However, an effect could not be ruled out in certain subgroups, such as blacks or women who are homozygous for apoE4...- Incidence, natural history, and risk factors for biliary sludge and stones during pregnancyCynthia W Ko
Department of Medicine, University of Washington, Seattle 98195, USA
Hepatology 41:359-65. 2005..Prepregnancy obesity and serum leptin are strong risk factors for pregnancy-associated gallbladder disease... 
Persistent demographic differences in colorectal cancer screening utilization despite Medicare reimbursementCynthia W Ko
Department of Medicine, Division of Gastroenterology, Box 356424, University of Washington, Seattle, Washington, USA
BMC Gastroenterol 5:10. 2005..In addition, significant demographic differences in screening utilization exist. Insurance coverage may be one factor influencing utilization of colorectal cancer screening tests...
Accuracy of Medicare claims for identifying findings and procedures performed during colonoscopyCynthia W Ko
Department of Medicine, University of Washington, Seattle, Washington, USA
Gastrointest Endosc 73:447-453.e1. 2011..Administrative claims data are frequently used for quality measurement...- Comparing risks and benefits of colorectal cancer screening in elderly patientsCynthia W Ko
Department of Medicine, University of Washington, Seattle, 98195, USA
Gastroenterology 129:1163-70. 2005..The aim of this study was to quantify risks and benefits of different screening strategies in elderly patients with varying life expectancies... - Biliary sludge and acute pancreatitis during pregnancyCynthia Ko
Division of Gastroenterology, Department of Medicine, University of Washington, Seattle, WA 98195, USA
Nat Clin Pract Gastroenterol Hepatol 3:53-7; quiz following 57. 2006..Laboratory tests revealed elevated serum amylase and lipase levels. Ultrasonography demonstrated gallbladder sludge without gallstones, gallbladder wall thickening, or bile-duct dilatation... - Insulin resistance and incident gallbladder disease in pregnancyCynthia W Ko
Department of Medicine, University of Washington, Seattle, Washington 98195, USA
Clin Gastroenterol Hepatol 6:76-81. 2008..Insulin resistance is associated with prevalent gallstones, but its effect on initial gallstone formation is not well-understood... - Serious complications within 30 days of screening and surveillance colonoscopy are uncommonCynthia W Ko
University of Washington, Seattle, Washington 98195, USA
Clin Gastroenterol Hepatol 8:166-73. 2010..We evaluated the incidence of serious complications within 30 days after screening or surveillance colonoscopies in diverse clinical settings and sought to identify potential risk factors for complications... 
Specialty differences in polyp detection, removal, and biopsy during colonoscopyCynthia W Ko
Department of Medicine, University of Washington, Seattle, WA 98195, USA
Am J Med 123:528-35. 2010..Colonoscopy is a technically complex procedure commonly performed to detect and remove colorectal pathology. This study examined the influence of provider characteristics on polyp detection, polyp removal, and diagnostic biopsy rates...- Utilization and predictors of early repeat colonoscopy in Medicare beneficiariesCynthia W Ko
Department of Medicine, University of Washington, Seattle, Washington 98195, USA
Am J Gastroenterol 105:2670-9. 2010..The aims of this study were to examine the use of second colonoscopy within 1 year of an index colonoscopy, and to examine patient and provider factors associated with use of early repeat colonoscopy... - Fecal occult blood testing in a general medical clinic: comparison between guaiac-based and immunochemical-based testsCynthia W Ko
Department of Medicine, University of Washington, Seattle, Washington, USA
Am J Med 115:111-4. 2003..Newer immunochemical-based tests are designed to improve accuracy and patient compliance. We compared patient compliance and the test characteristics of these two types of tests... - Effect of Medicare coverage on use of invasive colorectal cancer screening testsCynthia W Ko
Division of Gastroenterology, University of Washington, Box 356424, Seattle, WA 98195, USA
Arch Intern Med 162:2581-6. 2002..Screening for colorectal cancer is now widely recommended but underused. Lack of insurance coverage for screening tests may be one reason patients do not undergo these procedures... - Cost-effectiveness of strategies for primary prevention of nonsteroidal anti-inflammatory drug-induced peptic ulcer diseaseC W Ko
Department of Medicine, University of Washington, Seattle 98195 6424, USA
J Gen Intern Med 15:400-10. 2000..This study examined the relative cost-effectiveness of different strategies for the primary prevention of NSAID-induced ulcers in patients that are starting NSAID treatment... - Graft loss due to recurrent focal segmental glomerulosclerosis in renal transplant recipients in the United StatesK C Abbott
Nephrology and Organ Transplant Service, Walter Reed Army Medical Center, Washington, DC, USA
Am J Kidney Dis 37:366-73. 2001..This is a US government work. There are no restrictions on its use... - Hospitalizations for fractures after renal transplantation in the United StatesK C Abbott
Nephrology Service, Walter Reed Army Medical Center, Washington, DC 20307, USA
Ann Epidemiol 11:450-7. 2001..To investigate the incidence, risk factors, and associated mortality of fractures in renal transplant recipients... - Is blood the ideal submucosal cushioning agent? A comparative study in a porcine modelS A Giday
Division of Gastroenterology, Johns Hopkins Hospital, Baltimore, MD 21205, USA
Endoscopy 38:1230-4. 2006..Creation of a submucosal cushion before endoscopic mucosal resection (EMR) significantly reduces perforation risk. We evaluated six solutions as cushioning agents in live pigs... - Hospitalizations for bacterial septicemia after renal transplantation in the united statesK C Abbott
Nephrology Service, Walter Reed Army Medical Center, Washington, DC 20307 5001, USA
Am J Nephrol 21:120-7. 2001..It is common belief in the transplant community that rates of septicemia in transplant recipients have declined, but this has not been studied in a national population... - Hospitalizations for bacterial endocarditis after renal transplantation in the United StatesK C Abbott
Nephrology Service, Walter Reed Army Medical Center, Washington, DC 20307 5001, USA
J Nephrol 14:353-60. 2001..The national rate of and risk factors for bacterial endocarditis in renal transplant recipients has not been reported... - Endoscopic retrograde cholangiopancreatography, but not esophagogastroduodenoscopy or colonoscopy, significantly increases portal venous pressure: direct portal pressure measurements through endoscopic ultrasound-guided cannulationJ M Buscaglia
Department of Medicine, Division of Gastroenterology, Johns Hopkins Hospital, Baltimore, Maryland 21205, USA
Endoscopy 40:670-4. 2008..The aims of this study were to assess the effect of esophagogastroduodenoscopy (EGD), colonoscopy, and endoscopic retrograde cholangiopancreatography (ERCP) on portal vein, inferior vena cava (IVC), and systemic pressures... - Gastrointestinal disorders of the critically ill. Biliary sludge and cholecystitisCynthia W Ko
Division of Gastroenterology, Department of Medicine, University of Washington, Box 356424, Seattle, WA 98195, USA
Best Pract Res Clin Gastroenterol 17:383-96. 2003..For many patients, percutaneous cholecystostomy may be the best management option. Cholecystostomy may also provide definitive drainage as patients recover and underlying critical illness resolves... - Incidence of minor complications and time lost from normal activities after screening or surveillance colonoscopyCynthia W Ko
Department of Medicine, University of Washington, Seattle, WA 98195, USA
Gastrointest Endosc 65:648-56. 2007..Few studies address the development of minor complications after screening or surveillance colonoscopy... - Physician specialty and the outcomes and cost of admissions for end-stage liver diseaseC W Ko
Department of Medicine, University of Washington, Seattle 98195, USA
Am J Gastroenterol 96:3411-8. 2001..Hospital costs were similar for patients cared for by the different physician groups... - Effectiveness of a provider reminder on fecal occult blood test follow-upMeaghan F Larson
VA Puget Sound Health Care System, Seattle, WA, USA
Dig Dis Sci 54:1991-6. 2009..To determine the impact of an electronic reminder upon the timeliness and proportion of patients referred for evaluation of a positive fecal occult blood test and receipt of colonoscopy... - Complications after ERCP in patients with primary sclerosing cholangitisJason P Etzel
Department of Medicine, University of Washington Medical Center, Seattle, Washington, USA
Gastrointest Endosc 67:643-8. 2008..There are conflicting data regarding the role of ERCP in patients with primary sclerosing cholangitis (PSC) and the risk of procedure-related complications... - Biliary sludge is formed by modification of hepatic bile by the gallbladder mucosaCynthia W Ko
Department of Medicine, Veterans Affairs Medical Center, Seattle, Washington, USA
Clin Gastroenterol Hepatol 3:672-8. 2005..Gallbladder bile has a lower calculated CSI, higher deconjugation of bilirubin, protein and mucin concentration and crystals were present. Hepatic bile samples are inappropriate for microscopic detection of microlithiasis... - Risk factors for gallstone-related hospitalization during pregnancy and the postpartumCynthia W Ko
Department of Medicine, University of Washington, Seattle, Washington 98195, USA
Am J Gastroenterol 101:2263-8. 2006..Risk factors for hospitalization include prepregnancy body mass index, race, Hispanic ethnicity, and maternal age... - The utility of contrast-enhanced endoscopic ultrasound in monitoring ethanol-induced pancreatic tissue ablation: a pilot study in a porcine modelS A Giday
Department of Medicine, Division of Gastroenterology, Johns Hopkins Hospital, Baltimore, Maryland 21205, USA
Endoscopy 39:525-9. 2007..The aim of our study was to evaluate local effects of intrapancreatic alcohol injection and the utility of contrast-enhanced endoscopic ultrasound (EUS) for its monitoring in a porcine model... - Impact of HIV seropositivity on graft and patient survival after cadaveric renal transplantation in the United States in the pre highly active antiretroviral therapy (HAART) era: an historical cohort analysis of the United States Renal Data SystemS J Swanson
Nephrology Service, Walter Reed Army Medical Center, Washington, DC 20307-5001, USA
Transpl Infect Dis 4:144-7. 2002.... - Epidemiology and natural history of common bile duct stones and prediction of diseaseCynthia W Ko
Department of Medicine, Division of Gastroenterology, University of Washington, Seattle, Washington, USA
Gastrointest Endosc 56:S165-9. 2002 - Clinical correlation of toxin and common antigen enzyme immunoassay testing in patients with Clostridium difficile diseaseScott D Lee
Department of Medicine, University of Washington School of Medicine, Seattle, Washington, USA
Am J Gastroenterol 98:1569-72. 2003..When both common antigen and toxin A are positive, the likelihood of C. difficile diarrhea is high; conversely, when both results are negative, the likelihood of C. difficile diarrhea is low... - Magnesium: does a mineral prevent gallstones?Cynthia W Ko
Am J Gastroenterol 103:383-5. 2008..Understanding the role of a healthy diet in gallstone-related diseases, including a diet high in magnesium, may lead to new preventive measures... - Dietary carbohydrates and gallstones: is there a link?Cynthia W Ko
Gastroenterology 129:373-5. 2005
Research Grants
- A Primary-Care Based Colorectal Cancer Screening ProgramCynthia Ko; Fiscal Year: 2006..If successful, this program may be useful to other large primary care practices, and may also help to improve utilization of other types of cancer prevention services ..
- Epidemiology of hepatocellular carcinomaCynthia Ko; Fiscal Year: 2006....
- Colonoscopy quality and outcomes in clinical practiceCynthia W Ko; Fiscal Year: 2010..The various algorithms we develop will be tested in a second, validation subset of our database to find the algorithm with optimal performance characteristics. ..