Table 3.
Comparisons of pure tone audiometry threshold according to the smoking amount in current smoker
| Frequency |
Smoking amount (pack-years) |
p value † | Post-hoc comparison | |||
|---|---|---|---|---|---|---|
| 0.05–9.9 * (n = 1,125) | 10–19.9 * (n = 1,413) | 20–29.9 * (n = 689) | ≥30 * (n = 366) | |||
| 1 kHz |
15.2 (0.3) |
15.2 (0.3) |
15.3 (0.4) |
16.9 (0.6) |
0.030 |
a,b,c < d |
| 2 kHz |
17.5 (0.4) |
17.2 (0.3) |
18.1 (0.5) |
20.1 (0.7) |
0.002 |
a,b,c < d |
| 3 kHz |
25.1 (0.5) |
23.7 (0.4) |
25.2 (0.6) |
27.2 (0.9) |
0.001 |
b < a,c < d |
| 4 kHz | 30.5 (0.6) | 29.3 (0.5) | 30.8 (0.7) | 31.5 (0.9) | 0.075 | - |
mean (standard error).
*a: 0.05–9.9, b: 10–19.9, c: 20–29.9, d: ≥30 pack-years.
†p-value was calculated by ANCOVA and adjusted for age, working period, noise level, body mass index, mean arterial pressure, fasting blood glucose, total cholesterol, triglyceride, HDL cholesterol, hemoglobin.