Table 3

Age and height adjusted regression coefficients β and standard errors (SE) for lung function tests for 27 660 miners

nFVCFEV1FEV1%FEF25–75%
βSEβSEβSEβSE
1 episode of TB2137−0.1200.0133-165 −0.1800.0113-165 −2.1620.1653-165 −0.4410.0283-165
2 episodes of TB366−0.3280.0293-165 −0.3620.0263-165 −2.7210.3803-165 −0.7090.0643-165
3 episodes of TB79−0.4040.0623-165 −0.4620.0563-165 −3.8430.8103-165 −0.8620.1353-165
4+ episodes of TB17−0.7710.1333-165 −0.9640.1203-165 −10.9951.7423-165 −1.7050.2913-165
TB + pneumoconiosis185−0.2370.0413-165 −0.3840.0373-165 −5.7070.5343-165 −0.8570.0893-165
Pneumoconiosis only1164−0.1390.0173-165 −0.2150.0153-165 −2.9170.2233-165 −0.5200.0373-165
Totaldf = 276593-151 R2 =  0.3801R2 = 0.4237R2 = 0.1174R2 = 0.2241
  • TB = tuberculosis; FEV1 = forced expiratory volume in one second; FVC = forced vital capacity; FEF25–75% = forced expiratory flow at 25–75% of forced vital capacity.

  • 3-165 p<0.001.

  • 3-151 There were 23 712 additional miners who did not have TB who were used as a comparison group in the regression model.