. 2017 Oct 30;5:e3949. doi: 10.7717/peerj.3949

Table 3. Results from multiple linear regression for associations with infants’ SSC with fathers the first and second day (24 h) after birth, respectively.

Significant p-values are printed in bold.

		Unadjusted		Full model^a		Trimmed model^b
Day	Variable	β (95% CI)	P	β (95% CI)	P	β (95% CI)	P
First	Mother’s age (years)	0.001 (−0.165; 0.167)	0.992	−0.050 (−0.230; 0.131)	0.583	–^c
	Boy	1.512 (−0.096; 3.121)	0.065	1.907 (0.262; 3.551)	0.024	1.678 (0.137; 3.220)	0.033
	Primipara	1.701 (0.097; 3.304)	0.038	1.363 (−0.327; 3.053)	0.112	1.297 (−0.316; 2.910)	0.113
	Induction of childbirth	0.546 (−1.503; 2.596)	0.596	1.214 (−0.804; 3.233)	0.233	1.278 (−0.647; 3.203)	0.189
	Caesarean section	1.753 (−0.253; 3.759)	0.086	3.273 (1.081; 5.464)	0.004	3.177 (1.153; 5.202)	0.003
	Night-time birth	0.676 (−0.971; 2.323)	0.415	2.036 (0.336; 3.737)	0.020	2.051 (0.413; 3.689)	0.015
	Gestational age (weeks)	0.169 (−1.319; 1.657)	0.821	0.508 (−1.141; 2.158)	0.539	–^c
	Infant’s birthweight (kg)	−2.672 (−5.255; −0.089)	0.043	−2.390 (−5.086; 0.306)	0.081	−1.956 (−4.451; 0.539)	0.122
	Supplementary artificial milk feeds given	0.182 (−1.557; 1.922)	0.835	−0.419 (−2.656; 1.818)	0.709	–^c
	Exclusive breastfeeding at discharge	0.896 (−0.745; 2.536)	0.279	1.068 (−0.902; 3.039)	0.282	1.594 (0.073; 3.114)	0.040
Second	Mother’s age (years)	−0.108 (−0.274; 0.057)	0.195	−0.096 (−0.270; 0.077)	0.270	−0.108 (−0.265; 0.049)	0.174
	Boy	0.047 (−1.619; 1.714)	0.955	0.015 (−1.568; 1.597)	0.985	–^c
	Primipara	2.884 (1.380; 4.388)	<0.001	2.853 (1.227; 4.480)	0.001	2.895 (1.380; 4.411)	<0.001
	Induction of childbirth	0.934 (−1.123; 2.991)	0.367	0.447 (−2.390)	0.646	–^c
	Caesarean section	−0.104 (−2.174; 1.966)	0.921	1.802 (−0.307; 3.911)	0.092	1.688 (−0.269; 3.644)	0.089
	Night-time birth	1.105 (−0.540; 2.751)	0.184	2.131 (0.495; 3.767)	0.012	2.019 (0.488; 3.550)	0.011
	Gestational age (weeks)	−0.366 (−1.864; 1.131)	0.626	−0.139 (−1.726; 1.448)	0.861	–^c
	Infant’s birthweight (kg)	−3.358 (−5.904; −0.812)	0.011	−2.828 (−5.422; −0.233)	0.033	−3.001 (−5.383; −0.618)	0.014
	Supplementary artificial milk feeds given	−0.612 (−2.359; 1.135)	0.486	−1.744 (−3.897; 0.409)	0.110	−1.857 (−3.454; −0.259)	0.024
	Exclusive breastfeeding at discharge	0.964 (−0.687; 2.615)	0.248	0.278 (−1.619; 2.174)	0.770	–^c

Notes.

First day: R² = 0.334; second day R² = 0.390.

First day: R² = 0.321; second day R² = 0.387.

Not in model.