['Diabetic patients reportedly have a higher incidence of peptic ulcer disease. The aim of this study was to investigate if type II diabetic patients have higher risk of developing peptic ulcer bleeding (PUB) and to identify possible risk factors of PUB in diabetic patients.', 'Using the National Health Insurance Research Database of Taiwan, records of 5699 type II diabetic patients and 11,226 age- and sex-matched non-diabetic patients in a 1:2 ratio were extracted for comparison from a cohort dataset of 1,000,000 randomly sampled subjects. Log-rank test was used to analyze differences in cumulative hazard of PUB between the two groups. Cox proportional hazard regressions were used to evaluate independent risk factors for PUB in all patients and identified risk factors of PUB in type II diabetic patients.', 'In a 7-year follow-up period, type II diabetic patients had significantly higher cumulative hazard of PUB than the controls (P < 0.001, log-rank test). By Cox proportional hazard regression analysis, diabetes was independently associated with increased risk of PUB (hazard ratio 1.44, 95% confidence interval 1.11-1.86; P < 0.001) after adjusting for age, sex, comorbidities (e.g. hypertension, coronary heart disease, heart failure, chronic renal disease, cirrhosis, and peptic ulcer disease), and ulcerogenic medication. Age, chronic renal disease, history of peptic ulcer disease, and use of non-steroidal anti-inflammatory drugs were risk factors for PUB in diabetic patients.'] Is diabetes an independent risk factor for peptic ulcer bleeding : a nationwide population-based cohort study?