Table 4.

Correlations between stimulated interleukin-6 and psychosocial factors by race and for the full sample.

	African American	White	Total
	(n = 32)	(n = 37)	(N = 69)
Pittsburgh Sleep Quality Inventory - Total	0.46^**	−0.02	0.22^†
Subjective quality¹	0.33^†	−0.05	0.09
Sleep latency¹	0.25	−0.09	0.05
Sleep duration¹	−0.51^**	−0.19	−0.29^*
Sleep efficiency¹	−0.38^*	0.03	−0.12
Sleep disturbance¹	0.47^**	0.10	0.25^*
Daytime dysfunction¹	0.29	0.15	0.27^*
Parenting Stress Index -Total	0.41^*	0.26	0.30^*
Parental distress	0.48^**	0.22	0.30^*
Difficult child	0.35^†	0.29^†	0.28^*
Parent-child dysfunctional interaction¹	0.18	0.14	0.16
Perceived Stress Scale	0.33^†	0.08	0.14
CES-D Scale - Total	0.37^*	−0.02	0.13
Depressed mood¹	0.46^**	−0.01	0.17
Somatic symptoms	0.29	0.04	0.14
Absence of positive affect¹	0.36^*	0.09	0.17

All analyses control for BMI.

Note: Higher Total PSQI scores, subjective quality rating, and sleep latency reflect greater severity of sleep problems

CES-D: Center for Epidemiologic Studies - Depression Scale

Spearman correlation. Pearson correlations were used unless otherwise noted.

^†

p ≤ 0.10;

p ≤ 0.05;

^**

p ≤ 0.01