Table 3.

Results post-imputation

	Linear association with PND score including adjustments for confounding variables, before imputation a	Linear association with PND score before imputation, post-imputation for missing data and adjustments for confounding
Self-reported sleep problems at age 16 years	1.07 (0.91–1.27), p = 0.415	1.08 (0.96–1.21), p = 0.185
Waking in the night at 16 years (none or at least once)	1.14 (1.00–1.30), p = 0.057	1.14 (1.05–1.25), p = 0.003
Sleep problems at 18 years on the CIS-R	1.25 (1.03–1.52), p = 0.027	1.26 (1.15–1.39), p < 0.001

Data are given as odds ratio (95% confidence interval).

PND, Postnatal depression; CIS-R, Clinical Interview Schedule-Revised.

^aSee Table 2.