Table 1. Prevalence of hearing impairment (%) from SR and pure tone audiometry by participant age and smoking behavior.
| Participants | N | Self Report | PTA > 25 dB (mild) | PTA > 40 dB (moderate) | PTA > 60 dB (severe) | M - E |
|---|---|---|---|---|---|---|
| All | 170 | 15.9 | 16.5 | 5.9 | 1.2 | 0.6 |
| Middle-aged | 90 | 21.1 | 31.1 | 11.1 | 2.2 | 10.0 |
| Younger | 80 | 10.0 | 0.0 | 0.0 | 0.0 | -10.0 |
| Smokers | 72 | 22.2 | 16.7 | 4.2 | 2.8 | -5.6 |
| Nonsmokers | 98 | 11.2 | 16.3 | 7.1 | 0.0 | 5.1 |
PTA=binaural pure tone average of 1000, 2000, 3000, and 4000 Hz.
M - E is the measured (PTA > 25 dB) minus estimated (SR) prevalence of hearing impairment.