title: [Epidemiological study on the occupational noise exposure and hypertension in mechanic factory workers].
abstract: OBJECTIVE
  To study the relations of noise expose and hypertension in mechanic factory workers.
  
  
  METHODS
  A cross-sectional study on 1205 workers (exposed to different noise levels) in Hunan was carried out, using questionnaire, blood pressure of the workers and the exposure level to noise at workplace.
  
  
  RESULTS
  The prevalence of hypertension was 12.1% in mechanic factory workers. There was an increasing tendency of hypertension rate along with the increase of accumulative noise doses (tendency chi-squared = 29.932, P < 0.01). Result by logistic regression analysis after adjusting age, history of hypertension in parents and body weight index showed that the risk of hypertension increased about 5% by 1 dB(A) of more noise exposure (OR = 1.047).
  
  
  CONCLUSIONS
  Noise exposure might serve as a risk factor of hypertension. Reducing the sound pressure level in workshops could work as an effective measure to control the incidence rate of hypertension in mechanic factory workers.
authors: School of Public Health, Central South University, Changsha 410078, China.
authors: Li-zhang
authors: LZ
authors: Chen
authors: Li-juan
authors: LJ
authors: Pang
authors: Ben-yan
authors: BY
authors: Fu