title: [The relationship between mine environment and hypertension in coal miners].
abstract: OBJECTIVE
  To investigate the relationship between mine environment and hypertension in miners.
  
  
  METHODS
  1736 male miners who worked under the ground and 825 on the ground were recruited in this study. Prevalence of hypertension under the ground and on the ground miners was compared.
  
  
  RESULTS
  Prevalence of hypertension of miners under the ground was 23.91% and on the ground was 15.52% (chi(2) = 23.56, P < 0.001). Compared to miners on the ground, the relative risk of hypertension under the ground workers was 1.71 (95%CI 1.38 - 2.13). Prevalence of hypertension was correlated to the years of ground working (chi(2) = 37.00, P < 0.001). The binary logistic regression showed significant relationship between mine environment and hypertension under the ground miners (OR = 1.05, 95%CI 1.02 - 1.08).
  
  
  CONCLUSIONS
  The underground environment is an important risk factor hypertension to the miners.
authors.affiliation: Heart Center, the Coal General Hospital, Beijing 100028, China.
authors.forename: Ming-xiao
authors.initials: MX
authors.lastname: Wang
authors.forename: Yun-xiao
authors.initials: YX
authors.lastname: Shang
mesh_terms: D000328:Adult; D003032:Coal Mining; D006801:Humans; D006973:Hypertension / Q000453:epidemiology*; D008297:Male; D008875:Middle Aged; D016273:Occupational Exposure; D015995:Prevalence; D012307:Risk Factors; D012494:Sampling Studies