Observational studyBMJ open2025
Effect of sleep quality on the severity of perimenstrual symptoms in Japanese female students: a cross-sectional, online survey.
Observational study in BMJ open, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
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Who cites it
4 citing papers in PubMed.
- Novel dietary FemTech based on dietary reference intakes for premenstrual and menstrual disorders: a pilot open-label randomized controlled trial of dietary intervention.BMC women's health · 2026Trial
- Effect of long-term intake ofFrontiers in nutrition · 2026Trial
- Associations of meal timing and sleep timing with premenstrual syndrome and dysmenorrhea in Japanese women: a cross-sectional study.Frontiers in nutrition · 2026Article
- The Inaccuracy of the Mood Disorder Questionnaire for Bipolar Disorder in a Community Sample: From the "DYMERS" Construct Toward a New Instrument for Detecting Vulnerable Conditions.Journal of clinical medicine · 2025Article
Corrections and comments
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Authors and funding
9 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
objectivesTo investigate the relationship between sleep quality and perimenstrual symptoms among Japanese female students.
designObservational, cross-sectional, online survey
settingWe used an online questionnaire to collate responses from Japanese female students on sleep quality and perimenstrual symptoms.
participantsA total of 298 female students aged 18-25 years in Japan were included in this study. PRIMARY AND SECONDARY OUTCOME MEASURES: The Menstrual Distress Questionnaire (MDQ) was used to assess the severity of perimenstrual symptoms for three periods-premenstrual, menstrual and postmenstrual-and the Japanese version of the Pittsburgh Sleep Quality Index was used to assess sleep quality. The MDQ scores were compared between two groups (normal-sleep quality and low-sleep quality) using Mann-Whitney U test. In addition, multiple logistic regression analysis was performed, and the MDQ subscales that showed significant differences between the groups were used as independent variables. The MDQ subscale that was strongly associated with sleep quality was calculated.
resultsOf the female students, 160 were classified into the normal-sleep quality group and 138 into the low-sleep quality group. The total MDQ scores were significantly higher in the low-sleep quality group at all phases of the menstrual cycle (respectively p<0.05). Among the MDQ subscales, 'pain' during menstruation and 'concentration' in the premenstrual and postmenstrual stages were associated with sleep quality (respectively p<0.05).
conclusionsImproving sleep quality was one possible strategy to reduce the severity of perimenstrual symptoms. These results may provide useful information for Japanese female students who suffer from perimenstrual symptoms.
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