1104 MATERNAL DEPRESSION AND SLEEP QUALITY IN EARLY POSTPARTUM: DO MATERNAL SLEEP-RELATED COGNITIONS AND NIGHTTIME BEHAVIOURS MEDIATE THE RELATIONSHIP?

Abstract

Introduction: While postpartum depression has been linked to poorer maternal sleep quality, the pathways underlining this relationship are not well known. This study aimed to investigate the links between maternal postpartum depression, cognitions regarding infant sleep, nighttime behaviours and reported sleep quality. We propose a model linking postpartum depression and maternal sleep quality through maternal cognitions and ensuing maternal behaviours. Methods: Using a prospective cohort study design, nulliparous women with a singleton pregnancy completed questionnaires at 18, 28, 36 weeks gestation and 5 weeks postpartum. A sample of 452 women participated in this study. Measures included the Edinburgh Postnatal Depression Scale, three subscales from the Maternal Cognitions about Infant Sleep Questionnaire (Anger, Limits and Doubt) and the Pittsburgh Sleep Quality Index. Maternal nighttime behaviours, including infant settling methods, checking, and sleep location, were assessed by a questionnaire. Path analysis was undertaken using Mplus version 7 and mediators were tested using the Indirect approach. Model fit was assessed using a variety of standard fit indices. Results: Depression is associated with maternal cognitions (Limits b=.20; p=.001; Anger b=.40, p