Table 3.

Predicting CRP as a Function of PSQI Sleep and the Interaction between PSQI Sleep and Age (n = 297)

	PSQI global		PSQI perceived sleep quality		PSQI sleep efficiency		PSQI daily disturbances
	b (SE)	β	b (SE)	β	b (SE)	β	b (SE)	β
Intercept	−.59 (.10)		−.53 (.08)		−.52 (.08)		−.46 (.11)
Sex (female = 1)	.02 (.07)	.02	.03 (.07)	.02	.02 (.07)	.01	.02 (.07)	.01
Parent education	−.05 (.02)	−.13*	−.05 (.02)	−.13*	−.05 (.02)	−.14*	−.05 (.02)	−.15*
Stress	.04 (.06)	.04	.02 (.06)	.02	.06 (.06)	.06	.09 (.06)	.09
Asian	−.20 (.10)	−.14*	−.20 (.10)	−.13*	−.20 (.10)	−.13*	−.21 (.10)	−.14*
Latino	−.03 (.09)	−.03	−.02 (.09)	−.02	−.04 (.09)	−.03	−.05 (.09)	−.04
Other ethnicity	.00 (.16)	.00	−.04 (.16)	−.02	.06 (.16)	.02	.02 (.16)	.01
Age	.21 (.05)	.23***	.21 (.05)	.23***	.21 (.05)	.23***	.20 (.05)	.23***
BMI (percentile)	.01 (.00)	.28***	.01 (.00)	.28***	.01 (.00)	.28***	.01 (.00)	.29***
Sleep	.01 (.07)	.06	.13 (.07)	.10	.03 (.07)	.07	−.05 (.06)	−.04
Sleep × age	−.02 (.02)	−.07	−.15 (.09)	−.09	−.11 (.09)	−.07	.01 (.08)	.01

Note.

^*p < .05,

^**p < .01,

^***p < .001.

Gender was coded such that male = 0 and female = 1. Parent education was an average of the primary caregiver’s and spouse’s level of education, where 1 = some elementary school, 2 = completed elementary school; 3 = some junior-high school, 4 = completed junior-high school; 5 = some high school; 6 = graduated from high school; 7 = trade or vocational school; 8 = some college; 9 = graduated from college; 10 = some medical, law, or graduate school; 11 = graduated from medical, law, or graduate school. Stress was participants’ reports of stress in the past month, averaging across 10 items, on a 5-point scale where 0 = never and 4 = very often. European Americans were coded as the reference group for ethnicity. Higher PSQI scores indicated poorer sleep. All non-categorical variables were centered at the sample mean. CRP values were log-transformed (mg/L).