Sleep in the Postpartum: Characteristics of First-Time, Healthy Mothers

Table 6

Correlations between mothers’ nighttime and daytime variables and infants’ sleep variables.

Mother sleep variables	Infant Sleep Variables
	2 months				6 months
	Daytime sleep episodes	Nighttime sleep episodes	Daytime TST	Nighttime TST	Daytime sleep episodes	Nighttime sleep episodes	Daytime TST	Nighttime TST
Nighttime variables
Poor sleep quality (SSC)	−.244	−.329	−.227	−0.120	.202	.228	.000	−.151
Insomnia Severity Scale (ISI)	−.043	−.098	−.171	−0.158	.056	.110	−.196	.015
Difficulty initiating or maintaining sleep (DIMS)
Sleep onset problem (SSC)	.173	.130	.097	−0.264	.063	.069	−.115	.055
Sleep maintenance problem (SSC)	.030	−.094	.023	−0.036	.159	.018	−.100	.222
Waking too early (SSC)	−.114	−.048	.118	0.185	.249	.289	.146	−.197
Nighttime TST, mother (Diary)	.201	−.107	.008	.673	−.105	−.318	.216	.202
Number of nighttime sleep episodes, mother (diary)	.489	.733	−.129	0.057	.267	.895	.159	−.162
Daytime variables
Fatigue Scale (ESFS)	.075	−.099	−.058	0.063	−.094	−.181	−.223	−.230
Sleepiness Scale (EFSS)	.020	−.127	−.130	0.026	−.285	−.308	−.361	−.013
Nonrefreshing sleep (SSC)	−.072	−.032	−.320	0.056	.175	.183	−.231	.080
Sleep daytime variables
Daytime TST, mother (diary)	−.308	−.149	.182	−.602	−.150	.098	.048	−.314
Number of daytime sleep episodes, mother (diary)	−.124	.044	.185	−.497	−.176	.218	.030	−.262
Mood variables
Depression (EPDS)	.075	.015	−.126	−0.165	−.059	−.063	−.002	−.266
Anxiety (GAD)	.009	−.183	−.151	−0.053	.135	−.072	−.022	−.184

Note. Significant correlation coefficients are bolded; ; ; ; .