Table 1 Characteristic of cases and controls included in the study
Breast cancer group | |||
Characteristic | Cases (n = 299) | Controls (n = 299) | p-value* |
Mean year of birth (range) | 1953 (1923–1989) | 1953 (1923–1990) | 0.93 |
Smoking, n (%) | |||
Yes (current + past) | 129 | 129 | – |
No (never smokers) | 170 | 170 | – |
Pack-years (range) | 6.61 (0–40) | 6.64 (0–50) | 0.49 |
Adnexectomy status, n (%) | |||
Yes | 15 | 15 | – |
No | 284 | 284 | – |
Occurrence of breast cancer among I° relatives, n (%) | |||
Yes | 39 | 41 | – |
No | 260 | 258 | – |
Lung cancer group | |||
Characteristic | Cases (n = 199) | Controls (n = 199) | p-value* |
Mean year of birth (range) | 1947 (1928–1977) | 1947 (1931–1976) | 0.62 |
Sex, n (%) | |||
Females | 51 | 51 | – |
Males | 148 | 148 | – |
Smoking, n (%) | |||
Yes (current + past) | 188 | 183** | – |
No (never smokers) | 11 | 16** | – |
Pack-years (range) | 30.14 (0–150) | 29.72 (0–150) | 0.50 |
Occurrence of lung cancer among I° relatives, n (%) | |||
Yes | 37 | 30 | – |
No | 162 | 169 | – |
Colon cancer group | |||
Characteristic | Cases (n = 150) | Controls (n = 150) | p-value* |
Mean year of birth (range) | 1947 (1924–1985) | 1947 (1927–1984) | 0.99 |
Sex, n (%) | |||
Females | 58 | 58 | – |
Males | 92 | 92 | – |
Smoking, n (%) | |||
Yes (current + past) | 95 | 94** | – |
No (never smokers) | 55 | 56** | – |
Pack-years (range) | 14.2 (0–90) | 14.1 (0–80) | 0.30 |
Occurrence of colon cancer among I° relatives, n (%) | |||
Yes | 17 | 16 | – |
No | 133 | 134 | – |