Table 3.

Multivariate RRs and 95% CIs of CRC associated with regular green tea consumption, stratified by selected covariates, the Shanghai Women's Health Study, 1996 to 2004

CovariatesEvents, nRR (95% CI) by green tea drinking
Pinteraction
NoYes
Age, y*
    <52571.00.68 (0.37-1.25)
    ≥521681.00.54 (0.34-0.85)0.46
Body mass index (kg/m2)
    <251371.00.62 (0.39-0.98)
    ≥25881.00.51 (0.28-0.93)0.60
Waist-to-hip ratio*
    <0.81981.00.77 (0.47-1.27)
    ≥0.811271.00.44 (0.25-0.76)0.10
Physical activity
    No1031.00.52 (0.31-0.88)
    Yes1221.00.64 (0.38-1.07)0.57
Red meat intake (g/d)*
    <511421.00.58 (0.36-0.93)
    ≥51831.00.58 (0.33-1.03)0.98
Total vegetable and fruit intake (g/d)*
    <5681301.00.52 (0.31-0.88)
    ≥568951.00.63 (0.38-1.05)0.84
  • NOTE: Analyses omitted the 1st year of follow-up. Adjusted for age; education; household income; cigarette smoking; alcohol drinking; physical activity; body mass index; menopausal status; nonsteroidal anti-inflammatory drug use; vitamin supplement use; prior histories of colorectal polyps and chronic ulcerative colitis; family history of CRC; and intakes of total energy, total vegetables, fruits, and red meat. When variable was used for stratification, it was not included in the model.

  • * Stratified based on the mean values of the covariates.