Table 3.

Sociodemographic and sleep characteristics of a sample of 355 low-income Head Start preschoolers enrolled in a study on stress and eating behavior

Variable	Mean (SD) or %
Child Age (years)	4.23 (0.53)
Child Sex
Male	49.9
Female	50.1
Child Race/Ethnicity
White, non-Hispanic/Latino	57.8
Black, non-Hispanic/Latino or othera	31.6
Hispanic/Latino, any race	10.7
Child body mass index z-scoreb	0.80 (1.04)
Child Weight Status
Not overweight	60.5
At risk for overweight (>85th percentile)	39.6
Parental Education
<High school	15.5
High school diploma or GEDc	30.4
Some education beyond high school	54.1
Household Income-to-Needs Ratio (1.0=poverty)	0.87 (0.76)
Household CHAOSd (higher=more chaos; range= 0-15)	4.09 (3.29)
Household Routine (higher=more routine; range=0-56)	45.43 (6.23)
Weeknight Sleep Duration	10 hr 22 min (47 min)
Weekend-night Sleep Duration	10 hr 45 min (1 hr 8 min)
Total Sleep per day (hours per night + naps during the day)	10 hr 39 min (2 hr 33 min)
Child’s Usual Bedtime (weekdays)	8:35 pm (45 min)
Child’s Usual Waketime (weekdays)	6:57 am (35 min)
Child’s Usual Midpoint (Median) of Sleep (weekday)	1:45 am (33 min)
Child’s Usual Bedtime (weekend nights)	9:40 pm (1 hr 7 min)
Child’s Usual Waketime (weekend days)	8:25 am (1 hr 11 min)
Child’s Usual Midpoint (Median) of Sleep (weekend)	3:01 am (60 min)
Sleep Hygiene (higher=better sleep hygiene; range= 0-10)	4.84 (0.50)
Sleep Quality (higher=higher quality sleep; range= 0-10)	4.13 (0.73)

^aIncludes Asian, Asian Pacific Islander, and Biracial, non-Hispanic

^bFrom Centers for Disease Control reference²⁵

^cGED=General Equivalency Diploma

^dCHAOS= Confusion, Hubbub, and Order Scale