Table III.
Relative risk (RR) with 95 percent confidence interval (CI) for cancer of the colon and rectum by sub-site and by occupational physical activity level in 1960 and 1970.
| Anatomic sub-site (ICD-7) | Occupational Physical Activity | Female | Male | ||||
|---|---|---|---|---|---|---|---|
| Cases | RRa | 95 % CI | Cases | RRa | 95 % CI | ||
| Colon (153) | Very high/high | 359 | 1.0 | Ref. | 1989 | 1.0 | Ref. |
| Moderate | 569 | 1.0 | 0.9–1.1 | 894 | 1.2 | 1.1–1.3 | |
| Light | 706 | 1.1 | 0.9–1.2 | 2314 | 1.3 | 1.1–1.4 | |
| Sedentary | 366 | 1.2 | 1.0–1.5 | 703 | 1.3 | 1.2–1.5 | |
| p-value for trend | p=0.045 | p<0.001 | |||||
| Proximal Colon (153.0-1) | Very high/high | 174 | 1.0 | Ref. | 937 | 1.0 | Ref. |
| Moderate | 269 | 1.0 | 0.8–1.2 | 416 | 1.2 | 1.0–1.3 | |
| Light | 325 | 1.1 | 0.9–1.3 | 1092 | 1.3 | 1.1–1.5 | |
| Sedentary | 188 | 1.4 | 1.1–2.0 | 319 | 1.2 | 1.0–1.5 | |
| p-value for trend | p=0.029 | p=0.0036 | |||||
| Ascending + Cecum (153.0) | Very high/high | 136 | 1.0 | Ref. | 660 | 1.0 | Ref |
| Moderate | 201 | 1.0 | 0.8–1.2 | 297 | 1.2 | 1.0–1.4 | |
| Light | 228 | 1.0 | 0.8–1.2 | 806 | 1.4 | 1.2–1.6 | |
| Sedentary | 132 | 1.3 | 0.9–1.8 | 238 | 1.3 | 1.1–1.6 | |
| p-value for trend | p=ns | p=0.0024 | |||||
| Transverse+ Flexures (153.1) | Very high/high | 38 | 1.0 | Ref. | 277 | 1.0 | Ref. |
| Moderate | 68 | 1.1 | 0.7–1.6 | 119 | 1.1 | 0.8–1.4 | |
| Light | 97 | 1.4 | 0.9–2.2 | 286 | 1.0 | 0.8–1.4 | |
| Sedentary | 56 | 2.0 | 1.1–3.5 | 81 | 1.0 | 0.7–1.5 | |
| p-value for trend | P=0.044 | p=ns | |||||
| Distal Colon (153.2-3) | Very high/high | 141 | 1.0 | Ref. | 773 | 1.0 | Ref. |
| Moderate | 215 | 1.0 | 0.8–1.2 | 352 | 1.2 | 1.1–1.4 | |
| Light | 274 | 1.1 | 0.8–1.4 | 899 | 1.3 | 1.1–1.5 | |
| Sedentary | 135 | 1.2 | 0.8–1.7 | 285 | 1.4 | 1.2–1.7 | |
| p-value for trend | P=ns | p<0.001 | |||||
| Descending (153.2) | Very high/high | 23 | 1.0 | Ref. | 97 | 1.0 | Ref. |
| Moderate | 32 | 0.8 | 0.4–1.4 | 48 | 1.4 | 1.0–2.0 | |
| Light | 40 | 0.9 | 0.5–1.6 | 120 | 1.6 | 1.1–2.4 | |
| Sedentary | 19 | 1.1 | 0.4–2.5 | 49 | 2.4 | 1.4–3.9 | |
| p-value for trend | P=ns | p<0.001 | |||||
| Sigmoid (153.3) | Very high/high | 118 | 1.0 | Ref. | 676 | 1.0 | Ref. |
| Moderate | 183 | 1.0 | 0.8–1.3 | 304 | 1.2 | 1.0–1.4 | |
| Light | 234 | 1.1 | 0.9–1.4 | 779 | 1.3 | 1.1–1.5 | |
| Sedentary | 116 | 1.2 | 0.8–1.8 | 236 | 1.3 | 1.0–1.6 | |
| p-value for trend | P=ns | p=0.020 | |||||
| Rectum (154) | Very high/high | 194 | 1.0 | Ref. | 1581 | 1.0 | Ref. |
| Moderate | 315 | 1.0 | 0.9–1.2 | 667 | 1.1 | 1.0–1.2 | |
| Light | 395 | 1.1 | 0.9–1.3 | 1515 | 1.0 | 0.9–1.2 | |
| Sedentary | 218 | 1.0 | 0.8–1.3 | 443 | 1.1 | 0.9–1.2 | |
| p-value for trend | P=ns | p=ns | |||||
a
Relative risk adjusted for 5- year age and calendar-year intervals of follow-up, place of residence, socioeconomic status