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

a 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 (<2,000/2,001–5,000/5,001–8,000/>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), BMI (continuous). b Odds ratio was adjusted for the various above confounders and red meat (continuous), fish (continuous). c Odds ratio was adjusted for the various above confounders and red meat (continuous), fish (continuous), beans (continuous). d Odds ratio was adjusted for the various above confounders in b and folate intake (continuous). e Odds ratio was adjusted for the various above confounders in c and folate intake (continuous). Odds ratios (ORs) and 95% confidence intervals (95%CIs) of colorectal cancer according to quartiles of choline and betaine intake.