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Seasonal variation in postnatal depression
Pauliina Hiltunen1, Jari Jokelainen, Hanna Ebeling
1Department of Child Psychiatry, University of Oulu, Kajaanintie 52 A, FIN-90220, Oulu, Finland. paulina.hiltunen@phks.fi
Journal of Affective Disorders
|January 7, 2004
Summary
Postnatal depression occurred in 16.2% of mothers shortly after birth and 13% at 4 months. Seasonal factors, particularly less light in autumn and winter, may influence the occurrence of this mood disorder.
Area of Science:
- Perinatal mental health
- Seasonal affective disorders
- Epidemiology of mood disorders
Background:
- Postnatal depression (PND) is a significant concern affecting mothers after childbirth.
- Understanding the influence of environmental factors like season on PND is crucial for timely intervention.
Purpose of the Study:
- To evaluate the incidence of postnatal depression in a general population.
- To investigate potential correlations between the occurrence of PND and different seasons or light exposure levels.
Main Methods:
- A longitudinal study involving 185 mothers from Oulu University Hospital, Finland.
- The Edinburgh Postnatal Depression Scale (EPDS) was administered twice: 2-7 days postpartum and 4 months postpartum.
- Analysis considered seasonal variations and light exposure periods (dark, intermediate, light) using chi-squared tests.
Main Results:
- Immediate postpartum: 16.2% of mothers scored as depressed (EPDS cut-off 13).
- Four months postpartum: 13.0% of mothers scored as depressed.
- Higher rates of mild depression were observed in autumn immediately postpartum (EPDS cut-off 10) and during darker periods (EPDS cut-off 13).
- Lower rates of depression were noted in spring at the 4-month follow-up (EPDS cut-off 13).
Conclusions:
- Seasonal variations and reduced light exposure may be associated with an increased occurrence of postnatal depression.
- Limitations include small group and sample sizes within specific months.
- Further research is warranted to confirm these seasonal influences on PND.
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