Table 2.
Characteristics of workers with and without notch in both ears
| Total (n = 540) |
With notch in two ears (n = 84) |
Without notch in two ears (n = 456) |
p value | |
|---|---|---|---|---|
| Mean ± SD | Mean ± SD | Mean ± SD | ||
| Age, years mean ± SD | 32.65 ± 7.01 | 32.55 ± 6.67 | 32.67 ± 7.08 | 0.884 |
| BMI, kg/m2 mean ± SD | 26.03 ± 3.91 | 26.17 ± 3.85 | 26.01 ± 3.92 | 0.749 |
| Working experience, years mean ± SD | 7.95 ± 3.56 | 9.90 ± 3.68 | 7.59 ± 3.43 | < 0.0001 |
| Smoke pack year (n = 42), mean ± SD | 5.29 ± 5.53 | 3.57 ± 2.27 | 5.59 ± 5.90 | 0.512 |
| Sex (male), Frequency (percent) | 534 (98.9) | 84 (100) | 450 (98.7) | 0.290 |
| Education level | ||||
| Upper diploma | 383 (70.9) | 62 (73.8) | 321 (70.4) | 0.311 |
| Under diploma | 157 (29.1) | 22 (26.2) | 135 (29.6) | |
| Smoking (yes) | 42 (7.8) | 8 (9.5) | 34 (7.5) | 0.469 |
| Exposure status | ||||
| No exposure | 232 (43) | 13 (15.5) | 219 (48) | < 0.0001 |
| Noise expose only | 209 (38.7) | 47 (56) | 28 (6.1) | |
| Solvent expose only | 51 (9.4) | 4 (4.8) | 47 (10.3) | |
| Noise and solvent (mix) | 48 (8.9) | 20 (23.8) | 28 (6.1) | |