Pre-pregnancy sleep duration and postpartum depression: a multicenter study in Japan

Area of Science:

• Reproductive Health
• Mental Health
• Epidemiology

Background:

• Postpartum depression (PPD) is a significant global public health concern.
• Understanding risk factors for PPD is crucial for timely intervention.
• Pre-pregnancy sleep duration's role in PPD remains under-explored.

Purpose of the Study:

• To investigate the association between pre-pregnancy sleep duration and PPD.
• To determine if this association differs between first-time mothers (primipara) and those who have had previous births (multipara).

Main Methods:

• A multicenter retrospective study involving 15,314 women in Japan.
• Participants were grouped by pre-pregnancy sleep duration (<6, 6-7, 7-8, 8-9, ≥9 hours).
• Regression analyses assessed the relationship between sleep duration and Edinburgh Postnatal Depression Scale (EPDS) scores at 1 month postpartum.

Main Results:

• Women sleeping <6 hours or 6-7 hours pre-pregnancy had significantly higher odds of elevated EPDS scores compared to those sleeping 7-8 hours.
• Each additional hour of sleep was associated with a 14% reduction in the risk of high EPDS scores.
• The association between short sleep duration and higher EPDS scores was more pronounced in multiparous women.

Conclusions:

• Short pre-pregnancy sleep duration is a significant risk factor for postpartum depression.
• This association is stronger in multiparous women, highlighting a specific vulnerable group.
• Assessing pre-pregnancy sleep duration is important for identifying women at high risk for PPD.