Hierarchical logistic regression models fitted on longstanding respiratory problems in children aged 3–11 years
| Model 1*: maternal education alone | Model 2*: maternal education and lone parenthood | Model 3*: maternal education, lone parenthood, and material hardship | Model 4*: maternal education, lone parenthood, material hardship, and smoking | |
|---|---|---|---|---|
| *All models adjusted for age, sex, and number of dependent children. | ||||
| Maternal education | 1.46 (1.19,1.79) | 1.40 (1.14,1.73) | 1.33 (1.08,1.64) | 1.32 (1.06,1.63) |
| Lone parenthood | – | 1.22 (1.02,1.45) | 1.11 (0.93,1.34) | 1.10 (0.91,1.32) |
| Material hardship | – | – | 1.52 (1.20,1.91) | 1.50 (1.19,1.90) |
| Maternal smoking | – | – | – | 1.06 (0.88,1.26) |