Table 2.

Correlation between Perceived Stress Scale Scores, Center for Epidemiologic Studies Depression Scale Scores, and State Anxiety Inventory Scores at the five study time points.

	Perceived Stress Scale (PSS)		Center for Epidemiologic Studies Depression Scale (CES-D)		State Anxiety Inventory (STAI-S)
	Pearson r	(p-value)	Pearson r	(p-value)	Pearson r	(p-value)
First trimester Hair cortisol concentration (pg/mg)	16 weeks (0.27)	0.11	16 weeks	0.11 (0.26)	16 weeks (0.23)	0.12
	22 weeks (0.20)	0.13	22 weeks	0.18 (0.06)	22 weeks (0.45)	0.08
	28 weeks (0.09)	0.17	28 weeks	0.11 (0.28)	28 weeks (0.84)	0.02
	34 weeks (0.39)	0.09	34 weeks	0.20 (0.06)	34 weeks (0.25)	0.12
	40 weeks (0.04)	0.23	40 weeks	0.27 (0.02)	40 weeks (0.08)	0.20
Second trimester Hair cortisol concentration (pg/mg)	16 weeks (0.02)	0.24	16 weeks (0.002)	0.32	16 weeks (0.05)	0.21
	22 weeks (0.12)	0.16	22 weeks	0.08 (0.46)	22 weeks (0.36)	0.10
	28 weeks (0.19)	0.14	28 weeks (0.02)	0.25	28 weeks (0.03)	0.23
	34 weeks (0.32)	0.11	34 weeks (0.15)	0.16	34 weeks (0.16)	0.15
	40 weeks (0.07)	0.21	40 weeks (0.23)	0.14	40 weeks (0.91)	0.01
Third trimester Hair cortisol concentration (pg/mg)	16 weeks (0.06)	0.20	16 weeks (0.01)	0.27	16 weeks (0.05)	0.22
	22 weeks (0.09)	0.18	22 weeks (0.77)	0.03	22 weeks (0.27)	0.12
	28 weeks (0.27)	0.12	28 weeks (0.03)	0.24	28 weeks (0.02)	0.26
	34 weeks (0.31)	0.11	34 weeks (0.21)	0.14	34 weeks (0.06)	0.21
	40 weeks (0.12)	0.19	40 weeks (0.20)	0.15	40 weeks (0.55)	0.07

Significant correlations are in bold.