Table 4.
the risks of hypertension in the subjects with occupational noise exposure
| Groups | n | Non-hypertension | hypertension | OR1 (95%CI)* | P value | OR2 (95%CI)** | P value |
|---|---|---|---|---|---|---|---|
| Non-exposed group | 1399 | 1273(91.0%) | 126(9.0%) | 1.00(Ref.) | |||
| Noise-exposed group | 1390 | 1143(82.2%) | 247(17.8%) | 1.941(1.471-2.561) | <0.001 | ||
| Noise intensity (dB) | |||||||
| 80- | 490 | 411(83.9%) | 79(16.1%) | 1.411(0.947-2.102) | 0.091 | 1.000(Ref) | |
| 85- | 571 | 471(82.5%) | 100(17.5%) | 2.128(1.535-2.952) | <0.001 | 1.510(1.005-2.268) | 0.047 |
| 90- | 237 | 193(81.4%) | 44(18.6%) | 2.018(1.326-3.070) | 0.001 | 1.283(0.783-2.102) | 0.323 |
| ≥95 | 92 | 68(73.9%) | 24(26.1%) | 3.002(1.676-5.376) | <0.001 | 2.018(1.068-3.811) | 0.031 |
| Ptrend | <0.001 | 0.064 | |||||
| Work- years of noise exposure | |||||||
| 0 | 1399 | 1273(91.0%) | 126(9.0%) | 1.000(Ref) | |||
| 1- | 795 | 680(85.5%) | 115(14.5%) | 1.495(1.064-2.100) | 0.020 | 1.000(Ref) | |
| 5- | 394 | 321(81.5%) | 73(18.5%) | 2.029(1.421-2.898) | <0.001 | 1.199(0.813-1.767) | 0.360 |
| 10- | 100 | 74(74.0%) | 26(26.0%) | 2.609(1.504-4.527) | 0.001 | 1.412(0.785-2.542) | 0.249 |
| ≥15 | 101 | 68(67.3%) | 33(32.7%) | 4.055(2.318-7.094) | <0.001 | 2.080(1.114-3.880) | 0.021 |
| Ptrend | <0.001 | 0.022 | |||||
| cumulative noise exposure | |||||||
| ≤80 | 1399 | 1273(91.0%) | 126(9.0%) | 1.000(Ref) | |||
| 80- | 479 | 418(87.3%) | 61(12.7%) | 1.107(0.712-1.721) | 0.652 | 1.000(Ref) | |
| 90- | 434 | 359(82.7%) | 75(17.3%) | 1.987(1.377-2.869) | <0.001 | 1.637(1.015-2.638) | 0.043 |
| 95- | 274 | 215(78.5%) | 59(21.5%) | 2.261(1.536-3.328) | <0.001 | 1.733(1.034-2.904) | 0.037 |
| ≥100 | 203 | 151(74.4%) | 51(25.6%) | 2.829(1.871-4.277) | <0.001 | 2.006(1.154-3.488) | 0.014 |
| Ptrend | <0.001 | 0.018 | |||||
| Noise category | |||||||
| Stable | 451 | 388(86.0%) | 63(14.0%) | 1.000(Ref) | |||
| Unstable | 939 | 755(80.4%) | 184(19.6%) | 1.324(0.907-1.933) | 0.146 | ||
| Earplug wearing | |||||||
| Yes | 956 | 801(83.8%) | 155(16.2%) | 1.000(Ref) | |||
| No | 185 | 155(83.8%) | 30(16.2%) | 0.910(0.585-1.415) | 0.674 | ||
Multiple logistic regression was used to compare the differences among the subjects with different noise exposure adjusted by confounders such as age, sex, smoking, and drinking status
*OR1 was calculated taking the non-exposed group as the reference, adjusting for age, smoking, and drinking status
**OR2 was calculated taking the lowest levels of noise exposure as the reference, adjusting for age, smoking and drinking status