Comparison of hearing loss and other variables between volunteers according to frequency of downloading
| Characteristic | Downloads per year | ||||
| <150/year (n=55) | >150/year (n=55) | P value | |||
| Age—mean, SD | 42.5 | 9.9 | 45.9 | 10.3 | 0.0813 |
| Male—n, % | 41 | 74.6 | 42 | 76.4 | 0.8247 |
| Race—n, % | 0.5583 | ||||
| White | 54 | 98.2 | 53 | 96.4 | |
| Tinnitus—n, % | 11 | 20.0 | 9 | 16.4 | 0.6210 |
| Noisy hobbies—n, % | 30 | 54.6 | 22 | 40.0 | 0.1266 |
| Shoot or hunt—n, % | 22 | 40.0 | 23 | 41.8 | 0.8462 |
| Current other noisy job—n, % | 3 | 5.5 | 1 | 1.8 | 0.3083 |
| Previous loud job—n, % | 38 | 69.1 | 29 | 52.7 | 0.0786 |
| Ambient noise (dBA)—mean, SD | 83.3 | 5.0 | 84.4 | 5.3 | 0.2713 |
| In-ear noise dosimetry level (dBA)—mean, SD | 74.3 | 7.0 | 78.6 | 6.5 | 0.0014 |
| Hearing at start*—mean, SD | 16.3 | 11.8 | 18.7 | 12.3 | 0.2915 |
| Years between audiograms—mean, SD | 4.6 | 1.3 | 4.3 | 1.2 | 0.2809 |
| Annual rate of hearing loss*—dB/year—mean, SD | 0.98 | 1.55 | 0.34 | 1.25 | 0.0171 |
*Binaural average of 3, 4, 6 kHz.