Table 6

Regression models for annual changes in lung function

Independent variablesVCFEV1FEV1/VCFEF25–75
Coeff.SECoeff.SECoeff.SECoeff.SE
A regression coefficient (coeff.) with a negative value indicates that the variable is associated with a decline of the lung function parameter. All listed variables were included simultaneously in the models; each coefficient and p value is controlled for all other covariates. Age, smoking, height, log(IgE), and initial values are continuous variables; exposure: controls = 0, farmers = 1; altitude: plain = 0, tableland = 1.
*p<0.05, †p<0.025, ‡p<0.01, §p<0.001.
Exposure7.949.23−3.806.54−0.30†0.13−21.5014.22
Age−1.79§0.43−1.46§0.32−0.03§0.01−2.01‡0.66
Smoking0.020.43−0.490.31−0.02§0.01−1.53†0.65
Male50.42§14.3520.78*10.16−0.060.1842.85*20.79
Height2.98§0.801.80‡0.54−0.010.012.001.10
Altitude7.638.154.485.800.040.10−5.9112.69
log(IgE)−6.727.71−9.305.48−0.190.10−31.87‡11.88
Initial value−0.05§0.01−0.04§0.01−0.10§0.01−0.06§0.01
Intercept−236.67−127.2011.817.28
r20.180.140.400.22