Table 3

Risk factors for developing asthma presumed to be induced by TDI (analysis based on conditional logistic regression with backward elimination)

Explanatory variables3-150 Risk ratio 95% CI
Earlier exposure to TDI (yes=1, no=0)3.11.1 to 9.0
Earlier exposure to phosgene (yes=1, no=0)4.31.3 to 15.7
Current cigarette smoking (packs/day)0.40.1 to 1.0
Duration of exposure (y)0.80.7 to 0.9
  • 3-150 Three variables, intensity of exposure to TDI (8-h TWA), earlier exposure by inhalation to any respiratory irritant other than TDI, and sex were NS at p<0.05.