Related Experiment Video
Updated: May 27, 2026

Association Between Sleep Quality and Cognitive Symptoms in Patients with Major Depressive Disorder
Published on: April 26, 2024
Factors associated with sleep quality in pregnant women: a prospective observational study
Shao-Yu Tsai1, Lu-Ting Kuo, Yeur-Hur Lai
1School of Nursing, College of Medicine, National Taiwan University, Taipei. stsai@ntu.edu.tw
Background:
: Sleep disturbance is a significant health issue in pregnant women. Although previous studies contribute to an understanding of the multifactorial nature of pregnancy-related sleep disturbance, objective measures of sleep were not included, and so data may be subject to recall and potential participant self-report bias.
Objective:
: The aim of this study was to identify sociodemographic, lifestyle, and health-related factors associated with poor sleep quality in women during their third trimester of pregnancy.
Methods:
: This prospective study included 30 nulliparous women who wore a wrist actigraph to objectively monitor sleep for 7 consecutive days and completed the Pittsburgh Sleep Quality Index.
Results:
: Fifteen women (50%) had a Pittsburgh Sleep Quality Index global score of >5, indicating poor sleep quality. Mean actigraphic sleep efficiency was only 80.05% ± 6.27%. There were significant differences (p < .01) in sleep offset time and total nocturnal sleep time between weekdays and weekends. Later sleep onset time was associated with poorer sleep, including longer sleep latency, and reduced total nocturnal sleep time and sleep efficiency.
Discussion:
: Nulliparous women experience both objective and subjective sleep disturbances, and their sleep patterns differ between weekdays and weekends during their third trimester of pregnancy. Results suggest that maternal sleep pattern may be improved by maintaining a regular and earlier bedtime so women have more opportunity to obtain sufficient nocturnal sleep and improved sleep quality.
Related Concept Videos
Substance Use Disorders Affecting Sleep
Understanding the concepts of physical dependence,...
Insufficient Sleep and Sleep Deprivation
Sleep deprivation is a more severe form of sleep loss...
Management of Insomnia
Insomnia
Multiple factors contribute...
Stages of Sleep
Before sleep begins, in wakefulness, the brain exhibits primarily beta waves, which are high in frequency and low in amplitude, indicating alertness...
Observational Studies
There are three types of observational studies – Prospective, retrospective, and cross-sectional.
Prospective Study
Prospective studies, also known as longitudinal or cohort studies, are carried out by collecting future data from groups sharing similar characteristics. One example of...
