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Which peptic ulcers bleed? Results of a case-control study. DUSUK Study Group.

BACKGROUND
The incidence of ulcer bleeding has not decrease despite effective medical treatment of peptic ulcer disease. Numerous studies have been performed on risk factors for ulcer bleeding, but only a few studies have related the risk of developing ulcer bleeding to the risk of developing uncomplicated ulcer disease.


METHODS
This study was performed as a multicenter interdisciplinary case-control study and was based on diagnosis by endoscopy, prospective data collection, and multivariate analysis. To every study patient with ulcer bleeding (case) one patient with uncomplicated peptic ulcer proven at endoscopy (control) was assigned with regard to sex, ulcer localization, and age (+/-5 years). The controls were randomly taken from three sources: inpatients, outpatients, and patients treated by a private physician.


RESULTS
Owing to strict inclusion and exclusion criteria, 209 matched pairs were available for evaluation out of 401 patients with peptic ulcer bleeding. In univariate analysis the duration of ulcer pain and the number of previous ulcer treatments proved to be protective factors for ulcer bleeding. The intake of non-steroidal anti-inflammatory drugs (NSAID) as a whole, acetylsalicylic acid (aspirin), and paracetamol gave an increased risk for ulcer bleeding. Multivariate analysis identified four risk factors for peptic ulcer bleeding: lung disease, NSAID intake, no pretreatment with H2 blockers, and acetylsalicylic acid intake.


CONCLUSIONS
The following patient groups represent a risk for peptic ulcer bleeding: multimorbid patients, receiving NSAID and/or aspirin, and patients with no previous ulcer history.