Table 4.
Regression coefficients for birthweight z‐score by interpregnancy interval category in the Scandinavian Successive Small‐for‐Gestational‐Age Birth cohort, 1986‐88 (N = 1406)
| Interpregnancy interval, in months | Model 1: Unadjusted | Model 2a | Model 3b |
|---|---|---|---|
| Birthweight z‐score regression coefficient (95% CI) | |||
| <12 | −0.13 (−0.47, 0.21) | −0.07 (−0.46, 0.31) | −0.05 (−0.47, 0.36) |
| 12‐17 | −0.25 (−0.55, 0.05) | −0.15 (−0.46, 0.17) | −0.13 (−0.46, 0.20) |
| 18‐23 | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) |
| 24 or more | −0.25 (−0.52, 0.02) | −0.23 (−0.50, 0.05) | −0.23 (−0.52, 0.05) |
a
Adjusted for maternal age at last delivery, parity, smoking at time of conception, last pregnancy stillbirth or neonatal death, occupation, ability to raise 5000 NOK in 1 wk, rating of own/family wealth, education level.
b
Adjusted for all Model 2 covariates plus pregnancy intention.