Maternal sleep disturbances in late pregnancy and the association with emergency caesarean section: A prospective cohort study.

Objectives: To investigate the association between measures of sleep quality, sleep duration and sleep disorder symptoms in late pregnancy and likelihood of emergency caesarean section.

Design: Population-based prospective cohort study SETTING: New Zealand PARTICIPANTS: 310 Māori (Indigenous New Zealanders) and 629 non-Māori women MEASUREMENTS: Multivariable logistic regression models were used to investigate the association between type of delivery (emergency caesarean section vs. spontaneous vaginal delivery) and self-reported sleep duration, sleep quality and sleep-related symptoms, (e.g. snoring, breathing pauses during sleep, legs twitching/jerking) in the third trimester of pregnancy. Models were adjusted by ethnicity (ref=non-Māori), age (ref=16-19 y), parity (ref=nulliparous), clinical indicators (any vs. none), area deprivation (ref=least deprived quintile), BMI and for some models smoking.

Results: Women who reported poor quality sleep as measured by the General Sleep Disturbance Scale in later pregnancy had almost twice the odds of delivering via emergency caesarean than women with good sleep quality (OR=1.98, 95% CI 1.18-3.31). Reporting current breathing pauses during sleep (OR=3.27, 95% CI 1.38-7.74) or current snoring (OR=1.65, 95% CI 1.00-2.72) were also independently associated with a higher likelihood of an emergency caesarean. Short sleep duration and leg twitching/jerking were not independently associated with emergency caesarean section in this study.

Conclusions: Supporting healthy sleep during pregnancy could be a novel intervention to reduce the risks associated with emergency caesarean section. Research on the effectiveness of sleep interventions for reducing caesarean section risk is required.