Table 1.
Basic characteristics of noise- exposed and control group
| variables | Noise-exposed group (n = 1390) | control group (n = 1399) | P value |
|---|---|---|---|
| Age (years) (mean ± SD) | 33.1 ± 8.7 | 33.1 ± 8.6 | 0.941# |
| Smoking status (%) | |||
| Yes | 56.2 | 46.6 | |
| No | 43.8 | 53.4 | <0.001§ |
| Drinking (%) | |||
| Yes | 68.6 | 41.0 | |
| No | 31.4 | 59.0 | <0.001§ |
| Years to noise exposure, years,* | 4.2(1.7,8.0) | ||
| Noise intensity exposure, dB (A),* | 87.5 (82.5,87.5) | ||
| cumulative noise exposure (CNE)* | 92.3(88.3,96.8) | ||
| Noise protection (%) | 83.8 | ||
CNE, cumulative noise exposure, was calculated as CNE = 10 × log 10SPL × years of noise exposure), where, SPLis the sound pressure level [dB (A)] of noise exposure
*Data are presented as median (P25, P75)
#independent t-test; §, χ 2 test