Table 3.

Associations of neonatal hair glucocorticoid concentrations directly postpartum with perinatal and maternal factors.

		β (95% CI)	P value
Perinatal factors
Gestational age	Cortisol	0.07 (0.04 to 0.10)	<0.001
	Cortisone	0.04 (0.01 to 0.06)	0.004
Gestational age (only term pregnancies)	Cortisol	0.11 (0.07 to 0.16)	<0.001
	Cortisone	0.04 (−0.001 to 0.08)	0.06
Birth weight (kg)	Cortisol	0.09 (−0.003 to 0.17)	0.06
	Cortisone	0.10 (0.03–0.17)	0.008
Birth weight (s.d.)	Cortisol	0.01 (−0.05 to 0.06)	0.79
	Cortisone	0.03 (−0.02 to 0.07)	0.23
Male sex	Cortisol	0.10 (−0.02 to 0.21)	0.09
	Cortisone	0.08 (−0.01 to 0.18)	0.07
Delivery via cesarian section	Cortisol	−0.14 (−0.26 to −0.03)	0.015
	Cortisone	−0.14 (−0.24 to −0.05)	0.003
Perinatal infection (≥7 days antibiotics)	Cortisol	0.17 (0.06–0.29)	0.003
	Cortisone	0.22 (0.13–0.31)	<0.001
Respiratory problems	Cortisol	−0.07 (−0.28 to 0.13)	0.47
	Cortisone	−0.06 (−0.22 to 0.11)	0.52
Maternal factors
Age	Cortisol	−0.01 (−0.02 to 0.01)	0.31
	Cortisone	0.00 (−0.01 to 0.01)	0.82
Ethnicity	Cortisol	−0.04 (−0.15 to 0.08)	0.55
	Cortisone	−0.09 (−0.16 to 0.01)	0.07
Maternal smoking	Cortisol	−0.09 (−0.18 to 0.003)	0.06
	Cortisone	−0.09 (−0.43 to 0.26)	0.62
Parity	Cortisol	−0.26 (−0.36 to −0.16)	<0.001
	Cortisone	−0.07 (−0.17 to 0.02)	0.12
Hypertensive disorders	Cortisol	−0.02 (−0.25 to 0.21)	0.85
	Cortisone	−0.15 (−0.33 to 0.04)	0.12

Values represent log-transformed β (95% confidence interval) as calculated with linear regression.