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Screening colonoscopy in Chinese and Western patients: a comparative study
Maw-Soan Soon1, Richard A Kozarek, Kamran Ayub
1Department of Gastroenterology, ChangHua Christian Medical Center, ChangHua, Taiwan ROC.
The American Journal of Gastroenterology
|January 6, 2006
Summary
Chinese patients show lower colon neoplasia rates but more distal disease compared to Westerners. Advanced neoplasia prevalence was similar, suggesting colonoscopy is viable but sigmoidoscopy may be more advantageous for Chinese screening.
Area of Science:
- Gastroenterology
- Oncology
- Epidemiology
Background:
- Screening colonoscopy is crucial for colorectal cancer prevention.
- Understanding ethnic variations in colonic neoplasia is vital for tailored screening strategies.
Purpose of the Study:
- To compare colonic neoplasia findings between Chinese and Western populations undergoing screening colonoscopy.
- To evaluate the prevalence, distribution, and characteristics of colonic neoplasia in these cohorts.
Main Methods:
- Asymptomatic adults aged 40+ underwent concurrent screening colonoscopy in Taiwan and Seattle.
- Prevalence and distribution of colonic neoplasia and advanced neoplasia were compared between cohorts.
- Risk factors and screening strategy sensitivities were analyzed.
Main Results:
- The Western cohort (3,403 subjects) had higher overall neoplasia (20.7%) than the Chinese cohort (1,456 subjects, 14.7%).
- Prevalence of advanced neoplasia was similar (4.9% vs 4.0%), but Chinese patients had more distal neoplasia (66.4% vs 52.6%).
- Sigmoidoscopy sensitivity for advanced neoplasia was higher in Chinese (79.3%) versus Western patients (67.5%).
Conclusions:
- Chinese patients exhibit lower overall colon neoplasia but a more distal distribution compared to Westerners.
- Advanced neoplasia prevalence was comparable, indicating colonoscopy's viability but potentially smaller advantage over sigmoidoscopy in Chinese populations.
- Findings support tailored screening approaches based on ethnic and geographic factors.
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