Table 4.

Correlations Between WM Performance, Sleep Variables, Depression Severity, and Maternal Hormone Levels in the Pregnant Women (n = 28)

	Estradiol	Cortisol	EPDS	MADRS	#Hours Sleep	# Awakenings
SOP errors	−.45*	−.19	.34‡	.48*	−.10	.26
SPWM errors	−.33‡	−.23	.34‡	.36‡	.09	.01
EPDS	−.12	.36‡			−.40*	.55*
MADRS	−.25	.28			−.37‡	.65*

^*p < .05,

^‡p < .10;

all p-values are two-tailed. Partial correlations are shown, controlling for individual variation in the number of days prior to parturition when testing took place. EPDS = Edinburgh Depression Scale; MADRS = Montgomery-Asberg Depression Scale; # Hours Sleep = number of hours slept in past 24 hrs; # Awakenings = number of nighttime awakenings; SOP = Self-Ordered Pointing; SPWM = Spatial Working Memory Test. Not shown in table: the correlation between serum cortisol and EPDS score in the Preg+ subgroup considered on its own was r = .64.