Postoperative adverse events of cholecystectomy in the Medicare population

UMMS Affiliation

Department of Quantitative Health Sciences

Publication Date


Document Type



Aged; Aged, 80 and over; Chi-Square Distribution; Cholecystectomy; Common Bile Duct; Female; Hospital Mortality; Humans; Logistic Models; Male; Medicare; Outcome Assessment (Health Care); Retrospective Studies; Risk Factors; Severity of Illness Index; United States


Biostatistics | Epidemiology | Health Services Research


We explored the use of postoperative adverse events of cholecystectomy as possible screens for poor quality of care. Retrospective analysis of clinical data abstracted from hospital charts between 1985-1986 was conducted on a random sample of 3,182 cholecystectomy cases. Severity of illness models were developed predicting adverse events following cholecystectomy in patients with and without bile duct exploration. Outcome measures included 17 nonfatal adverse events and death within 30 days of admission. Adverse event rates were 23.2% for cases with bile duct exploration and 14.4% for cases without bile duct exploration. Cross-validated R-squareds and C-statistics showed that models had real, although modest, predictive power. We conclude that clinically meaningful adverse events of cholecystectomy can be successfully identified through chart abstraction.


Am J Med Qual. 1995 Spring;10(1):29-37. Link to article on publisher's site

Journal/Book/Conference Title

American journal of medical quality : the official journal of the American College of Medical Quality

PubMed ID


Related Resources

Link to Article in PubMed