No nursery | Nursery attended | Normal-late school attendance (≥5 years) | Early school attendance (<5 years) | |
Number deaths | 485 | 86 | 325 | 317 |
Sex-adjusted | 1.0 (Ref.) | 0.82 (0.67 to 1.02) | 1.0 (Ref.) | 1.02 (0.86 to 1.20) |
Multiply adjusted | 1.0 | 0.89 (0.69 to 1.17) | 1.0 | 1.04 (0.89 to 1.23) |
Multiple-adjustment is adjustment for potential confounders measured at birth (father’s social class, mother’s attendance at postcompulsory school, overcrowding in the home, mother’s smoking status prior to pregnancy, mother’s weight) and 7 years (maternal interest in the child’s education, breast feeding).