Table 4

Perinatal and non-perinatal risk factors for asthma among 16 year old Finnish adolescents combined in a single model4-1 4-2

  • 4-1 Selection of variables by backward stepwise logistic regression.

  • 4-2 Regression results corrected by generalised estimating equations (GEE).

  • 4-3 Proportion of cases due to exposure to the risk factor among all those exposed and unexposed.26

  • 4-4 Test for trend p<0.01.