IMPORTANCE Preschool-aged children often lack sufficient sleep and experience sleep difficulties. A consistent bedtime routine, falling asleep alone, and other sleep practices reduce difficulties and increase sleep duration. OBJECTIVE To evaluate the effects of a preschool-based sleep health literacy program on children's sleep duration and difficulties and on parent sleep knowledge, attitudes, self-efficacy, and beliefs 9 and 12 months after the program. DESIGN, SETTING, AND PARTICIPANTS This stepped-wedge cluster randomized clinical trial was implemented across the 2018-2019 school year. Head Start preschool personnel delivered interventions and collected outcomes data at baseline and 4 follow-ups. Seven Head Start agencies across New York State were randomized to implement interventions in either fall 2018 or winter and spring 2019. Outcomes were ascertained at 9-and 12-month follow-up. From March 19 through September 28, 2018, Head Start staff recruited (a) English-or Spanish-speaking parents (b) of children 3 years of age on or about September 2018 (c) who planned to remain at the site through the school year. Altogether, 519 parent-child (aged 3 years) dyads completed baseline and (any) followup data. INTERVENTIONS A 2-week classroom curriculum for children, a 1-hour parent workshop, and 1-on-1 parent discussions at home or school.
MAIN OUTCOMES AND MEASURESOutcomes were the pre-vs postintervention differences measured at baseline and 9-month follow-up for parent-reported child school-night sleep duration per sleep logs, mild or moderate sleep difficulties per a validated questionnaire, and the total and domain scores for parent sleep knowledge, attitudes, self-efficacy, and beliefs. A modified intentionto-treat analysis excluding participants with only baseline data was used.
RESULTSThe mean (SD) age at enrollment of 519 children was 2.7 (0.1) years, 264 (50.9%) were girls, 196 (37.8%) lived in Spanish-speaking households, and 5 (0.9%) identified as Alaskan Native or American Indian, 17 (3.2%) as Asian American or Pacific Islander, 57 (10.8%) as Black, 199 (37.8%) as White, and 63 (12.0%) as other. Mean sleep durations increased nonsignificantly from baseline by 5.6 minutes (95% CI, −2.3 to 13.6 minutes; P = .17) at 9-month follow-up and by 6.8 minutes (95% CI, 0.2-13.7 minutes; P = .06) at 12-month follow-up. There was a slight improvement in parental knowledge (1.13 unit increase from baseline; 95% CI, 0.13-2.12 units), but no significant outcomes for parent sleep attitudes (0.16 unit increase from baseline; 95% CI, −0.46 to 0.77 units), self-efficacy (−0.13 unit decrease from baseline; 95% CI, −1.02 to 0.76 units) and beliefs (−0.20 unit decrease from baseline; 95% CI, −0.56 to 0.16 units). Intervention effects for child sleep difficulties were not (continued) Key Points Question Does a sleep health education program for children and parents in Head Start improve childhood sleep and related outcomes? Findings This stepped-wedge cluster randomized clinical trial of 519 parentchild (aged 3 years at enroll...