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A case-control study of ulcerative colitis in Japan
Y Nakamura1, M Kobayashi, M Nagai
1Department of Public Health, Jichi Medical School, Minamikawachi, Japan.
Journal of Clinical Gastroenterology
|January 1, 1994
Summary
Smoking and regular alcohol consumption appear to reduce ulcerative colitis risk in Japanese populations. However, surgical history and certain personality traits may increase risk, differing from global findings.
Area of Science:
- Gastroenterology
- Epidemiology
- Internal Medicine
Background:
- Ulcerative colitis (UC) is a chronic inflammatory bowel disease with complex etiology.
- Understanding geographical variations in UC risk factors is crucial for targeted prevention and management.
Purpose of the Study:
- To investigate the risk factors for ulcerative colitis (UC) specifically within the Japanese population.
- To compare these findings with previously identified risk factors in other countries.
Main Methods:
- A case-control study was conducted in Japan between 1988 and 1990.
- Patients receiving financial aid for UC treatment were compared with age- and sex-matched population-based controls.
Main Results:
- Smoking was associated with a decreased risk of UC (OR = 0.30).
- Frequent alcohol consumption (>= 5 days/week) also showed a reduced risk (OR = 0.49).
- Factors like surgical history, occupational status, and family history of UC differed from other studies, while difficulties in human relations, family history of asthma, and personality traits (nervousness, anxiety, obsessive behavior) were identified as risk factors.
Conclusions:
- While some UC risk factors align with international findings, others, including surgical procedures, occupational status, and family history of the disease, present unique patterns in the Japanese population.
- Further case-control studies are necessary to confirm these observed differences and elucidate their consistency.