Table 1 Distribution (%) of selected baseline characteristics of basal cell carcinoma cases and non-cases among 63,912 white participants in the US Radiologic Technologists study
Characteristic | No BCC | BCC |
|---|---|---|
Person-years at risk | ||
 1,082,775 |  |  |
Age at entry, mean (SD) | Â | Â |
 38.81 (9.41) |  |  |
Age at exit, mean (SD) | Â | Â |
 55.75 (8.43) |  |  |
Total | 61,761 | 2151 |
Sex | ||
 Male | 12,651 (20.5) | 431 (20.0) |
 Female | 49,110 (79.5) | 1720 (80.0) |
Birth year | ||
 < 1940 | 9787 (15.8) | 558 (25.9) |
 1940–1949 | 21,060 (34.1) | 732 (34.0) |
 1950+ | 30,914 (50.1) | 861 (40.0) |
Highest level of education | ||
 Unknown | 9703 (15.7) | 228 (10.6) |
 School | 241 (0.4) | 19 (0.9) |
 Vocational/other | 2414 (3.9) | 80 (3.7) |
 Two-year rad tech program | 29,224 (47.3) | 981 (45.6) |
 College or graduate school | 20,179 (32.7) | 843 (39.2) |
Smoking status | ||
 Unknown smoking status | 141 (0.2) | 4 (0.2) |
 Never smoker | 30,606 (49.6) | 1067 (49.6) |
 Former smoker | 17,502 (28.3) | 678 (31.5) |
 Current smoker | 13,144 (21.3) | 394 (18.3) |
 Smoked, unknown if current smoker | 368 (0.6) | 8 (0.4) |
Alcohol (drinks/week) | ||
 Unknown | 910 (1.5) | 18 (0.8) |
 Never drinker | 10,632 (17.2) | 342 (15.9) |
 0–2.99 | 34,751 (56.3) | 1154 (53.6) |
 3–6.99 | 9051 (14.7) | 370 (17.2) |
 ≥7 | 6417 (10.4) | 267 (12.4) |