Table 2.

Bivariate correlations between demographic variables and HPA-axis indicators at 12 months postpartum.

	(1)	(2)	(3)	(4)	(5)	(6)
	Maternal Cortisol ln(pg/mg)	Maternal Cortisone ln(pg/mg)	Maternal DHEA ln(pg/mg)	Infant Cortisol ln(pg/mg)	Infant Cortisone ln(pg/mg)	Infant DHEA ln(pg/mg)
Woman’s height (cm)	−0.01	0.04	−0.06	0.07	0.02	0.00
Woman’s weight (kg)	0.25**	0.24**	−0.10	0.02	0.04	−0.13
Woman’s age	−0.03	−0.09	−0.06	−0.00	0.16*	−0.09
Parity	0.01	−0.08	−0.12	−0.06	0.12	−0.04
Woman’s education (yrs)	0.07	0.08	0.17*	0.10	0.04	0.00
Husband’s education (yrs)	0.03	0.08	0.07	0.05	−0.04	−0.12
Low SES (poorest 3 quintiles)	0.02	−0.04	0.01	−0.15	0.05	−0.02
Baseline depression (PHQ-9)	0.25**	0.20**	−0.23**	0.11	0.01	−0.20**
Baseline stress (PSS)	0.28***	0.21**	−0.16*	0.08	0.04	−0.15
Index child female	0.05	−0.00	−0.04	0.09	0.02	0.04
Age of child (days)	−0.25***	−0.25***	0.11	0.06	−0.03	0.20**

^*p < 0.10

^**p < 0.05

^***p < 0.01

Pairwise correlations between HPA axis hormones and baseline characteristics.