Table 2.

NICU parents Quality of Dyadic Relationship (QDR36) Index and associated factors when the infant is 1 year old, analyzed with a Generalized Linear Model (scale response linear).

	Mothers (n = 160)		Fathers (n = 123)
	B, (95% CI)	p value	B, (95% CI)	p value
Educational level
Upper secondary school or less	0.48 (−0.27 to 1.22)	0.21	−0.29 (−1.18 to 0.61)	0.53
Higher education	ref		ref
Born in Sweden
No	1.77 (0.28 to 3.25)	0.02	0.75 (−0.90 to 2.40)	0.37
Yes	ref		ref
Age
21–28 years	1.64 (0.56 to 2.72)	0.003	2.06 (0.57 to 3.55)	0.007
29–34 years	0.76 (−0.18 to 1.70)	0.11	1.09 (0.15 to 2.04)	0.023
35–42 years	ref		ref
First child
No	−0.25 (−1.04 to 0.53)	0.52	−0.20 (−1.18 to 0.77)	0.68
Yes	ref		ref
Number of births
Multiple	−0.62 (−2.06 to 0.82)	0.40	−1.49 (−3.00 to 0.15)	0.05
Singleton	ref		ref
EPDS ≥ 13 at 1 year
Yes	−0.98 (−2.54 to 0.58)	0.22	n/a
No	ref		n/a
EPDS ≥ 10 at 1 year
Yes	n/a		−3.52 (−4.91 to −2.13)	<0.001
No	n/a		ref
Length of hospital stay after birth
30–150 days	0.91 (−0.27 to 2.09)	0.13	−0.92 (−2.34 to 0.51)	0.21
15–30 days	−0.35 (−1.36 to 0.66)	0.50	0.61 (−0.66 to 1.89)	0.34
7–14 days	0.91 (0.05 to 1.78)	0.04	0.68 (−0.44 to 1.81)	0.23
1–6 days	ref		ref
Slept together with partner and infant whole or part of the time at the NICU
No	−0.82 (−1.61 to −0.03)	0.04	−0.28 (−1.30 to 0.75)	0.60
Yes	ref		ref
Parent’s frequency of doing household duties
Often or always	−1.58 (−2.38 to −0.78)	<0.001	−0.57 (−1.56 to 0.42)	0.26
Sometimes or never	−1.30 (−2.87 to 0.27)	0.10	−1.28 (−2.72 to 0.16)	0.08
Half of the time	ref		ref
Social Support, MOS-SSS Index (m, SD)	0.56 (0.11 to 1.01)	0.01	0.44 (−0.18 to 1.07)	0.16

Presented with estimated change of QDR36 (B), 95% confidence interval (95% CI) and p value for each variable.