Table 2.
Characteristics of cases and controls.
| Colon Cancer Characteristics | Cases (n = 1,155) | Controls (n = 7,552) |
|---|---|---|
| No. (%) | No. (%) | |
| Year of diagnosis | ||
| 1983 | 218(18.9) | 2,674(35.4) |
| 1984 | 254(22.0) | 1,660(22.0) |
| 1985 | 259(22.4) | 1,302(17.2) |
| 1986 | 246(21.3) | 1,010(13.4) |
| 1987 | 178(15.4) | 906(12.0) |
| Marital Status | ||
| Single | 56(4.8) | 352(4.7) |
| Married/common law | 958(82.9) | 6,269(83.0) |
| Widowed | 74(6.4) | 463(6.1) |
| Separated/divorced | 54(4.7) | 405(5.4) |
| Not answered | 13(1.1) | 63(0.8) |
| Education | ||
| ≤7 years | 136(11.8) | 842(11.1) |
| 8–11 years | 511(44.2) | 3,336(44.2) |
| High school | 138(11.9) | 830(11.0) |
| Post-secondary | 329(28.5) | 2,144(28.4) |
| Not answered | 41(3.5) | 400(5.3) |
| Alcohol consumption status | ||
| Never drinker | 137(11.9) | 738(9.8) |
| Ever drinker | 890(77.1) | 5,456(72.2) |
| Not answered | 128(11.1) | 1,358(18.0) |
| Smoking duration, years | ||
| 0 | 282(24.4) | 1,501(19.9) |
| 1–29 | 379(32.8) | 2,026(26.8) |
| 30–44 | 284(24.6) | 2,216(29.3) |
| 45+ | 196(17.0) | 1,682(22.3) |
| Not answered | 14(1.2) | 127(1.7) |
| Cigarette Pack-Years | ||
| 0 | 282(24.4) | 1,501(19.9) |
| 1–24 | 348(30.1) | 2,039(27.0) |
| 25–49 | 271(23.5) | 2,012(26.6) |
| ≥50 | 200(17.3) | 1,582(20.9) |
| Unknown | 54(4.7) | 418(5.5) |
| Pipe smoking status | ||
| Non-Pipe Smoker | 1,098(95.1) | 7,053(93.4) |
| Pipe Smoker | 57(4.9) | 499(6.6) |
| Respondent to questionnaire | ||
| Patient | 930(80.5) | 5,955(78.9) |
| Proxy | 199(17.2) | 1,403(18.6) |
| Unknown | 26(2.3) | 194(2.6) |