Characteristics of prospective studies on the association between central obesity [measured using waist circumference (WC)] and risk of colorectal cancer.

Abbreviations: WC, waist circumference; CRC, colorectal cancer; CC, colon cancer; RC, rectal cancer; DCC, distal colon cancer; PCC, proximal colon cancer; F, female; M, male; T, tertile; Q, quartile/quintile; HRT, hormone replacement therapy; NR, not report.aStudy quality was judged based on the Newcastle-Ottawa Scale (range, 1–9 stars).