Table III.

Multilevel Model Predicting Daily Ecological Momentary Assessment Pain Severity (N = 58 with 1268 Observations)

	Β	SE	t	P
Level 2: between-person variables
Age (years)	−1.67	1.87	−0.89	.38
Sex	6.03	5.52	1.09	.28
EMA—sleep quality mean	−0.17	0.19	−0.88	.39
Actigraphy—sleep duration	0.00	0.05	0.05	.96
Actigraphy—sleep efficiency	−0.59	0.56	−1.05	.30
Actigraphy—sleep latency	1.76	1.27	1.38	.18
Pulse oximeter—sleep apnea status	10.83	5.88	1.84	.07
Level 1: within-person variable
EMA—sleep quality the night before	−0.09	0.03	−3.37	<.00**
Interactions
Age×EMA—sleep quality mean	−0.12	0.06	−2.07	.04*
Age×EMA—sleep quality the night before	−0.01	0.01	−0.68	.50
Age×actigraphy—sleep duration	0.02	0.02	1.30	.20
Age×actigraphy—sleep efficiency	−0.00	0.16	−0.01	1.00
Age×actigraphy—sleep latency	−0.12	0.27	−0.43	.67
Age×pulse oximeter—sleep apnea status	0.17	2.06	0.09	.93
Conditional relationships of mean EMA sleep quality mean on pain severity at varying levels of age
	Simple intercept	z	Simple slope	z
Younger age (−1 SD below age)	−3.16	−0.18	0.20	0.83
Mean age	−8.16	−0.48	−0.17	−0.88
Older age (+1 SD above age)	−13.15	−0.71	−0.54	−1.95

Note. The model controls for SCD genotype, current hydroxyurea prescription, and positive and negative mood. Level 2 EMA variables are all person-centered means. Level 1 EMA subjective sleep quality variable is from the morning report referencing the previous night. EMA = ecological momentary assessment; SCD = sickle cell disease; SE = standard error.

^* p < .05; **p < .01.