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Table 3 Logistic regression with backward elimination

From: Analysis of maternal and perinatal determinants of allergic sensitization in childhood

Predictive variable OR 95% CI P
Maternal age < 0.001
 < 20 years 0.806 0.433–1.503  
 20 to 35 Reference  
 > 35 years 1.912 1.383–2.642  
Maternal smoking: yes 0.469 0.303–0.727 0.001
Maternal BMI 0.004
 Underweight 1.303 0.873–1.947  
 Normal weight Reference  
 Overweight 0.742 0.530–1.040  
 Obesity class I 0.614 0.391–0.964  
 Obesity class II 0.340 0.149–0.775  
 Obesity class III 0.621 0.302–1.278  
Infant sex: male 1.423 1.093–1.854 0.009
Preterm birth: yes 0.484 0.269–0.870 0.015
Conception: Assisted 1.771 1.076–2.914 0.025
Parity 0.881 0.785–0.988 0.031
  1. R2 = 0.03. P < 10−10. Mode of conception was defined as assisted or spontaneous
  2. OR odds ratio, CI confidence interval