Table 4.
Stratified analysis of cardiovascular and hearing conditions between the two exposure groups by occupational duration for noise.
| Variable | High exposure levelv N (%) | Low exposure levelc N (%) | P valuea | Crude OR (95% CI) | Adjusted OR (95% CI)b | |
|---|---|---|---|---|---|---|
| <3 years | ||||||
| Hypertension | Without | 362 (90.05) | 1434 (89.96) | 1.000 | 0.99 (0.69–1.43) | 0.99 (0.68–1.44) |
| With | 40 (9.95) | 160 (10.04) | ||||
| Hearing Loss | Without | 335 (83.33) | 1293 (81.12) | 0.349 | 0.86 (0.64–1.15) | 0.85 (0.63–1.14) |
| With | 67 (16.67) | 301 (18.88) | ||||
| 3–10 years | ||||||
| Hypertension | Without | 421 (86.98) | 1644 (89.30) | 0.168 | 1.25 (0.92–1.69) | 1.31 (0.97–1.79) |
| With | 63 (13.02) | 197 (10.70) | ||||
| Hearing Loss | Without | 372 (76.86) | 1449 (78.71) | 0.386 | 1.11 (0.88–1.41) | 1.15 (0.90–1.47) |
| With | 112 (23.14) | 392 (21.29) | ||||
| >10 years | ||||||
| Hypertension | Without | 116 (74.84) | 612 (83.95) | 0.010 | 1.76 (1.16–2.66) | 1.69 (1.11–2.56) |
| With | 39 (25.16) | 117 (16.05) | ||||
| Hearing Loss | Without | 66 (42.58) | 533 (73.11) | 0.000 | 3.67 (2.56–5.25) | 3.60 (2.51–5.16) |
| With | 89 (57.42) | 196 (26.89) | ||||
aTwo-sided χ2 test for comparing the rate of hypertension, abnormal ECG, and hearing loss between the two groups.
bAdjusted for sex and occupational exposure time for noise in the logistic regression model.
cReference group.