Physical activity and other lifestyle factors in relation to the prevalence of colorectal adenoma: a colonoscopy-based study in asymptomatic Koreans
Menée en Corée auprès de 1 526 participants asymtptomatiques ayant subi une coloscopie, cette étude évalue l'association entre l'activité physique, divers facteurs de risque comportementaux (tabagisme) et le risque d'adénomes colorectaux
Purpose : To evaluate physical activity and other lifestyle risk factors in relation to the prevalence of colorectal adenomas in asymptomatic Koreans. Methods : A total of 1,526 asymptomatic subjects who underwent a colonoscopy were enrolled. Lifestyle factors such as physical activity and smoking data were obtained using a questionnaire. The subjects were grouped into three exposure levels by tertiles of metabolic equivalent hours per week. We evaluated the risk factors in subjects with adenomas by risk stratification (low-risk adenoma group vs. high-risk adenoma group) and by anatomic location (proximal colon, distal colon, rectum, and multiple locations). The high-risk adenoma group was defined as subjects with advanced adenomas or multiple (≥3) adenomas. Results : A total of 456 participants had colorectal adenomas, and 861 had no polyps. In multivariate analyses, higher levels of physical activity were associated with a significantly decreased risk of colorectal adenomas (OR = 0.56, 95 % CI 0.40–0.79). This inverse association was stronger for the risk of high-risk adenomas (OR = 0.39, 95 % CI 0.21–0.73) than for low-risk adenomas (OR = 0.62, 95 % CI 0.43–0.89). The negative relation of physical activity was significant for distal colon adenomas (OR = 0.54, 95 % CI 0.30–0.95) and the adenomas with multiple locations (OR = 0.39, 95 % CI 0.21–0.72). Conclusions : Increased physical activity is associated with a reduced prevalence of colorectal adenomas. The inverse association between physical activity and adenoma was stronger for the risk of advanced or multiple adenomas.