Dynamic Associations Among Infant Sleep Duration, Maternal Sleep Quality and Postpartum Mood Symptoms

Area of Science:

• Perinatal mental health
• Sleep science
• Psychiatry

Background:

• Postpartum mood disturbances, including depression and anxiety, are prevalent.
• Infant sleep duration and maternal sleep quality are recognized risk factors.
• The dynamic interplay between these factors requires further investigation.

Purpose of the Study:

• To evaluate the reciprocal relationships between infant sleep duration, maternal sleep quality, and postpartum mood symptoms.
• To examine these associations over the first six months postpartum.
• To identify temporal links influencing maternal mental health.

Main Methods:

• Prospective observational pilot study with 168 pregnant women (aged 18-45) with a history of depression.
• Monthly assessments of maternal sleep quality, mood symptoms, and infant sleep duration for six months postpartum.
• Random intercept cross-lagged panel models (RI-CLPMs) to analyze stability and reciprocal effects.

Main Results:

• Infant sleep was associated with maternal sleep only in the first month postpartum.
• Better infant sleep at month 4 correlated with lower maternal depression and anxiety.
• Maternal sleep problems significantly predicted subsequent postpartum depression (b=0.21, p=0.005) and anxiety (b=0.32, p<0.001).

Conclusions:

• Maternal-infant sleep synchrony is strongest in the early postpartum period.
• Maternal sleep quality has a persistent, significant association with postpartum mood symptoms throughout six months.
• Interventions should address both maternal and infant sleep for effective management of postpartum mood disorders.