Table 1.
Distribution of 72 prostate cancer cases and 302 controls according to selected characteristics, Kingston, Ontario, Canada, 1997–1999.
| Characteristica | Cases (n=72) | Controls (302) | p-value |
|---|---|---|---|
| Age (years) Mean (SD) |
65.1 (6.0) | 63.5 (6.9) | 0.06 |
| Income per person (%) | |||
| Lower | 39 (54.2) | 154 (51.0) | 0.63 |
| Higher | 33 (45.8) | 148 (49.0) | |
| Ethnic background (%) | 0.57 | ||
| British | 53 (73.6) | 212 (70.2) | |
| Other | 19 (26.4) | 90 (29.8) | |
| Education (%) | |||
| ≤ High school | 39 (54.2) | 156 (51.7) | 0.70 |
| > High school | 33 (45.8) | 146 (48.3) | |
| Body mass index (kg/m2) at age 40 Mean (SD) |
24.9 (2.8) | 24.8 (2.9) | 0.82 |
| Smoking (%) | 0.98 | ||
| Ever smoker | 23 (31.9) | 97 (32.1) | |
| Non smoker | 49 (68.1) | 205 (67.9) | |
| Family history of prostate cancerb (%) | |||
| No | 50 (69.4) | 229 (75.8) | 0.26 |
| Yes | 22 (30.6) | 73 (24.2) | |
| Physical activity as a teenager (%) | 0.02 | ||
| Low | 16 (22.2) | 113 (37.4) | |
| Moderate | 37 (51.4) | 145 (48.0) | |
| Strenuous | 19 (26.4) | 44 (14.6) |
a
Mean (SD) for continuous or frequency (%) for categorical variables.
b
In first-degree relatives.