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Title: [Prevalence and influence factors of hypertension among the workers exposed to noise in steel making and steel rolling workshop of an iron and steel plant].
Author: Li Y, Chen G, Yu S.
Journal: Zhonghua Yu Fang Yi Xue Za Zhi; 2015 May; 49(5):405-10. PubMed ID: 26081703.
Abstract:
OBJECTIVE: To investigate the prevalence and influence factors of hypertension among the workers exposed to noise in steel making and steel rolling workshop of an iron and steel plant. METHODS: Using cluster sampling method, 3 150 workers exposed to noise participated in this study. According to do questionnaire survey and blood pressure measurement, 2 924 workers were tested, among which 1 313 workers were from steel making workshop and 1 611 workers were from steel rolling workshop. The relationships between different demographic characteristics, different habits, and different cumulative noise exposures of workers exposed to noise and hypertension were analyzed. RESULTS: For the hypertension prevalence rate, the total prevalence rate was 27.43% (802/2 924), the male was higher than the female (29.88 % (753/2 520) vs 12.13% (49/404), χ² = 55.13, P < 0.001), married ones were higher than the unmarried (29.84% (718/2 406) vs 16.22% (84/518), χ² = 39.76, P < 0.001), the smoking subjects were higher than the no smoking (30.31% (438/1 445) vs 24.61% (364/1 479), χ² = 11.93, P = 0.001), drinking ones were higher than the no drinking (31.53% (541/1 716) vs 21.61% (261/1 208), χ² = 35.05, P < 0.001). The hypertension prevalence rates among the subjects with education background in junior high school and below, high school (secondary) and university and above were separately 44.96%(125/278), 29.95%(455/1 519) and 19.70%(222/1 127) (χ² = 81.65, P < 0.001), among cumulative exposure groups 77-89, 90-94, 95-99, 100-104 and 105-113 were separately 8.43% (14/166), 14.48% (53/366), 24.28% (297/1 223), 36.65% (335/914) and 40.39%(103/255) (χ² = 127.58, P < 0.001). Multivariate logistic regression analysis showed that workers who exposed to cumulative noise in 95-99, 100-104 and 105-113 dB(A) ·year had the higher risk of hypertension, the OR (95%CI) were 1.84 (95% CI: 1.35-2.51), 1.74 (95% CI: 1.24-2.45) and 1.68 (95% CI: 1.09-2.58). Drinking (OR = 1.60, 95% CI: 1.32-1.95) and BMI ≥ 24.0 kg/m² (OR = 1.26, 95% CI: 1.22-1.30) were the risk factors for hypertension as well. CONCLUSION: Cumulative noise exposure, alcohol consumption and above normal BMI may affect the hypertension prevalence rate of the workers exposed to noise.

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