Demographic factors
| | | | | | |
Gender: male | 333 | 89 | 34 | 55 | 367 | 84 |
Race/ethnicity: white | 292 | 78 | 50 | 81 | 342 | 78 |
Cigarette smoker | | | | | | |
Current | 180 | 48 | 1 | 2 | 181 | 42 |
Ex | 65 | 17 | 4 | 6 | 69 | 16 |
Never | 129 | 34 | 57 | 92 | 186 | 43 |
Family history of HL | 83 | 22 | 18 | 29 | 101 | 23 |
Handedness: right | 329 | 88 | 57 | 92 | 386 | 89 |
Eye colour (brown) | 151 | 40 | 25 | 40 | 176 | 40 |
Hair colour (dark) | 282 | 75 | 48 | 77 | 330 | 76 |
| | | | | | |
Noise exposure factors
| | | | | | |
Ever regular firearms use | 84 | 22 | 0 | 0 | 84 | 19 |
Other vehicle use | 53 | 14 | 1 | 2 | 54 | 12 |
Loud recreation | 81 | 22 | 10 | 16 | 91 | 21 |
Listen to music loud | 113 | 30 | 3 | 5 | 116 | 27 |
| | | | | | |
Other exposure factors
| | | | | | |
Previous disease | 83 | 22 | 18 | 29 | 101 | 23 |
Ear injury | 72 | 20 | 8 | 13 | 80 | 18 |
Ototoxic therapy | 14 | 4 | 0 | 0 | 14 | 3 |
Aspirin use | 36 | 10 | 2 | 3 | 38 | 9 |