Portrait of sleep in preschoolers involved with Child Protective Services and from the community.

The objectives of this exploratory study were: 1) to draw a portrait of sleep, using actigraphic sleep measures, sleep diaries and a validated sleep questionnaire in preschoolers (3- to 5-year-olds) involved with Child Protective Services (CPS) and to compare it with preschoolers from the community, not involved with CPS and 2) to verify whether the sleep differences between the two groups persisted after adjusting for covariates (sociodemographic and child characteristics). A total of 92 preschoolers aged from 3 to 5 years (49,5 ± 7,0 months) participated in the study (n = 22 preschoolers involved with CPS and n = 70 preschoolers from the community). Actigraphic sleep parameters were recorded using the child's non-dominant wrist over 72 h during weekdays and sleep diaries were filled out by parents (for nighttime) and childcare specialists (for daytime). Parents filled out the Child Sleep Habits Questionnaires (CSHQ) to measure their perception of their child's sleep. Chi-square tests, ANOVAs, and linear regressions were used to analyze the data and adjust for covariates (sociodemographic and child characteristics). Preschoolers involved with CPS took longer to fall asleep and signaled significantly fewer nighttime awakenings to their parents compared to the group of preschoolers from the community. These significant effects were still present after adjusting for covariates (sociodemographic and child characteristics). Understanding the underpinnings of these sleep differences by exploring their possible links with daytime cortisol production, sleep ecology and parent-child attachment are interesting avenues for future research.

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Déclaration de conflit d'intérêts

Declaration of competing interest This work was supported by the Fonds de Recherche du Québec - Société et Culture [grant to Evelyne Touchette, 2019-NP-253118]. We acknowledge the considerable contribution of Sabrina Servot as a research assistant and the Centre de recherche universitaire des jeunes et des familles for data collection, and all families who participated in the study and members of the Child Protective Service from Capitale-Nationale. We are thankful to Hélène Paradis for her valuable statistical expertise. All authors have no conflict of interest to disclose.