Table 4

Multiple regression model for blood oxygen saturation (Spo2)

Independent variablesSpo2
Coeff.SEp value
Regression coefficients (coeff.) with negative values indicate a negative relation. All variables listed were included simultaneously in the model; each coefficient and p value is controlled for all other covariates. Age, smoking, log(IgE), and FEV1/VC are continuous variables. Exposure: controls = 0, farmers = 1; altitude: plain = 0, tableland = 1.
SE, standard error.
Exposure−0.460.18<0.01
Male−0.170.17NS
Age−0.020.07<0.001
Smoking−0.030.08<0.001
Altitude−0.120.15NS
FEV1/VC0.030.01<0.01
log(IgE)−0.190.14NS
Intercept96.75
r20.25