AN cases and controls: demographics and other characteristics
| Characteristic | AN case (N=97) | Control (N=388) |
|---|---|---|
| Age at diagnosis—mean (SD) | 52.0 (11.4) | Not applicable |
| Tenure at diagnosis—mean (SD) | 20.0 (14.2) | Not applicable |
| DOB—mean (range) | 1952 (1921–1982) | 1952 (1921–1982) |
| Year of hire—mean (range) | 1984 (1948–2006) | 1984 (1948–2006) |
| Salaried employees—n (%) | 38 (39.2) | 152 (39.2) |
| Male—n (%) | 71 (73.2) | 284 (73.2) |
| Hearing conservation programme participants—n (%) | 56 (57.7) | 172 (44.3) |
| Electrical job—n (%) | 7 (7.2) | 18 (4.6) |
| Smelter workers—n (%) | 20 (20.6) | 47 (12.1) |
AN, acoustic neuroma; DOB, date of birth.