Table 4. Risk factors for insomnia and for depressive symptoms eight weeks after delivery, results from a multivariate linear regression analysis among 1914 women.

	Variable	B	Adj. B	P value	95% CI		p value
							Wilk's test*
Insomnia a	Intercept		−4.30	.213	−11.08	2.48	.037
(BIS score)	Primipara	.98	1.51	<.001	.74	2.29	<.001
after delivery	Previous depression	3.89	1.00	.018	.17	1.82	<.001
	Fear of delivery	5.72	2.23	.002	.82	3.63	.008
	Stressfactors last year	.67	.19	.11	−.04	.42	.001
	BIS week 32	.35	.30	<.001	.26	.33	<.001
	Log EPDS week 32	7.27	1.91	.008	.51	3.30	<.001
	Log HSCL-A week 32	12.27	3.09	.012	.67	5.51	<.001
	Education level	.33	.81	.023	.11	1.50	.020
	Maternal age	.01	.08	.058	−.003	.17	.16
Depression b	Intercept		−.39	.001	−.63	−.15	*
(log EPDS)	Primipara	.03	.04	.002	.02	.07
after delivery	Previous depression	.22	.09	<.001	.06	.11
	Fear of delivery	.23	.02	.35	−.03	.07
	Stressfactors last year	.05	.02	<.001	.01	.02
	BIS week 32	.008	.00	.66	−.001	.002
	Log EPDS week 32	.58	.43	<.001	.38	.48
	Log HSCL-A week 32	.80	.23	<.001	.14	.31
	Education level	−.01	.03	.025	.004	.05
	Maternal age	−.004	.00	.76	−.003	.004

^a R² = 0.209.

^b R² = 0.356.

*p values for Wilk's Lambda for the significance of the multivariate tests (the p values are common for insomnia and depression).

CI - Confidence Interval.

BIS - Bergen Insomnia Scale.

EPDS - Edinburgh Postnatal Depression Scale.

HSCL A - Hopkins Symptoms Checklist, Anxiety module.