Antenatal infection | 0.165 | 0.414 | 0.119 to 1.438 |
Maternal smoking in pregnancy | 0.849 | 1.190 | 0.200 to 7.072 |
Antenatal steroids | 0.976 | 0.976 | 0.198 to 4.821 |
Male sex | 0.787 | 0.864 | 0.299 to 2.495 |
Gestational age | 0.723 | 0.933 | 0.634 to 1.373 |
Birth weight | 0.074 | 1.002 | 1.000 to 1.004 |
Surfactant | 0.127 | 2.165 | 0.802 to 5.842 |
Postnatal infection | 0.237 | 0.469 | 0.134 to 1.646 |
Duration of ventilator days | 0.852 | 0.994 | 0.937 to 1.055 |
Duration of oxygen therapy | 0.676 | 1.020 | 0.930 to 1.118 |
Discharge August–November | 0.056 | 2.868 | 0.973 to 8.455 |
Family history of atopy | 0.361 | 1.698 | 0.545 to 5.292 |
Number of school aged siblings | 0.906 | 1.030 | 0.633 to 1.674 |
Day care attendance | 0.821 | 0.837 | 0.181 to 3.883 |
Parental smoking in the home | 0.003 | 3.39 | 1.080 to 10.634 |
Breast feeding | 0.175 | 0.456 | 0.147 to 1.417 |
RSV LRTI | 0.013 | 3.09 | 1.277 to 7.532 |