Odds ratios (ORs) and 95% confidence intervals (95%CIs) of colorectal cancer according to quartiles of total choline and betaine intake stratified by selected variables.

a Intakes of folate were adjusted for the daily energy intake using the residual method.b Odds ratio was adjusted for age (continuous), sex (men/women), residence (urban/rural), marital status (married/other), education (primary school or blow/secondary school/high school/college or above), income level (8,001), occupation (white collar worker/blue collar worker/farmer or other), family history of cancer (yes/no), smoking status (current/never or past), passive smoking (yes/no), alcohol drinking (yes/no), degree of physical activity (less active/moderate active/more active), and BMI (continuous).c Odds ratio was adjusted for the various above confounders except sex and folate intake (continuous).d. Odds ratio was adjusted for the various above confounders and menopausal status in women.Odds ratios (ORs) and 95% confidence intervals (95%CIs) of colorectal cancer according to quartiles of total choline and betaine intake stratified by selected variables.