Table 3.
Stratified analysis of cardiovascular and hearing conditions between two exposure groups by age.
| Variable | High exposure level N (%) | Low exposure levelc N (%) | P valuea | Crude OR (95% CI) | Adjusted OR (95% CI)b | |
|---|---|---|---|---|---|---|
| <30 years | ||||||
| Hypertension | Without | 254 (96.58) | 984 (95.63) | 0.605 | 0.78 (0.37–1.61) | 0.78 (0.37–1.61) |
| With | 9 (3.42) | 45 (4.37) | ||||
| Hearing Loss | Without | 227 (86.31) | 927 (90.09) | 0.093 | 1.44 (0.96–2.17) | 1.43 (0.95–2.16) |
| With | 36 (13.69) | 102 (9.91) | ||||
| 30–45 years | ||||||
| Hypertension | Without | 456 (85.71) | 1903 (90.36) | 0.003 | 1.56 (1.18–2.07) | 1.59 (1.19–2.11) |
| With | 76 (14.29) | 203 (9.64) | ||||
| Hearing Loss | Without | 396 (74.44) | 1656 (78.63) | 0.041 | 1.26 (1.01–1.58) | 1.28 (1.03–1.60) |
| With | 136 (25.56) | 450 (21.37) | ||||
| >45 years | ||||||
| Hypertension | Without | 189 (76.83) | 803 (78.04) | 0.670 | 1.07 (0.77–1.49) | 1.08 (0.77–1.50) |
| With | 57 (23.17) | 226 (21.96) | ||||
| Hearing Loss | Without | 150 (60.98) | 692 (67.25) | 0.072 | 1.31 (0.99–1.75) | 1.32 (0.98–1.77) |
| With | 96 (39.02) | 337 (32.75) | ||||
aTwo-sided χ2 test for comparing the distribution of hypertension, abnormal ECG and hearing loss between two groups.
bAdjusted for sex and occupational exposure time for noise in the logistic regression model.
cReference group.