Table 3.
Sitting Time Watching TV and Colorectal Cancer Risk by Anatomic Subsites in Women and Men
| Sitting time watching TV (hours/week) | ||||||
|---|---|---|---|---|---|---|
| Subsites of colorectal cancer | 0–6.9 | 7–13.9 | 14–20.9 | ≥ 21 | Per 7 hours/week increment |
Ptrend |
| Colon cancer | ||||||
| No. of cases | ||||||
| Women | 230 | 229 | 225 | 200 | 884 | |
| Men | 189 | 206 | 129 | 72 | 596 | |
| Age-adjusted | ||||||
| Women | 1 | 1.09 (0.91,1.31) | 1.11 (0.92,1.33) | 1.27 (1.05,1.53) | 1.06 (1.02,1.10) | <.01 |
| Men | 1 | 1.02 (0.84,1.25) | 1.11 (0.88,1.39) | 1.22 (0.92,1.61) | 1.06 (0.98,1.14) | .16 |
| Multivariable* | ||||||
| Women | 1 | 1.08 (0.90,1.30) | 1.08 (0.90,1.30) | 1.19 (0.98,1.45) | 1.05 (1.01,1.08) | .02 |
| Men | 1 | 1.01 (0.82,1.24) | 1.06 (0.84,1.34) | 1.13 (0.85,1.50) | 1.03 (0.96,1.11) | .42 |
| Rectum cancer | ||||||
| No. of cases | ||||||
| Women | 58 | 57 | 50 | 50 | 215 | |
| Men | 76 | 72 | 36 | 26 | 210 | |
| Age-adjusted | ||||||
| Women | 1 | 1.10 (0.76,1.59) | 0.98 (0.67,1.43) | 1.36 (0.93,1.99) | 1.04 (0.97,1.12) | .29 |
| Men | 1 | 0.93 (0.67,1.29) | 0.85 (0.57,1.27) | 1.16 (0.74,1.83) | 1.02 (0.90,1.16) | .71 |
| Multivariable* | ||||||
| Women | 1 | 1.09 (0.76,1.58) | 0.97 (0.66,1.43) | 1.32 (0.90,1.95) | 1.04 (0.96,1.12) | .38 |
| Men | 1 | 0.94 (0.68,1.31) | 0.87 (0.57,1.30) | 1.21 (0.76,1.93) | 1.03 (0.91,1.17) | .63 |
*
Multivariable analyses were adjusted for the same set of variables as denoted in Table 2.
Note: The number of colon cancer and rectal cancer cases do not sum up to the number of colorectal cancer cases because some of colorectal cancer cases have missing information on anatomic subsite.