ArticleBMJ open2021
Internal consistency and factor structure of Jenkins Sleep Scale: cross-sectional cohort study among 80 000 adults.
Article in BMJ open, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT07315269 (Evaluation of the Effect of Daytime Power Napping on Depression, Stress and Sleep According to Working Method), which is not on this map. Cited by 31 papers, 1 of them a synthesis that pooled it.
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
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Evaluation of the Effect of Daytime Power Napping on Depression, Stress and Sleep According to Working Method: Prospective Cohort Study
Who cites it
31 citing papers in PubMed, 1 synthesis or guideline pooled it, 64 citations in OpenAlex.
- Drug treatments for fibromyalgia: systematic review and network meta-analysis of randomised trials.BMJ medicine · 2026Pooled it
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- Sleep Quality and Falls Risk in the ELSA Study: A Cross-Sectional and Prospective Cohort Study.Brain and behavior · 2026Article
- Night shift work and breast cancer risk: A cohort study based on payroll and survey data from Finland.Scandinavian journal of work, environment & health · 2026Article
- PEACE: Development and Validation of a Brief Five-Item Sleep Quality Scale for Community and Primary Care.Medicina (Kaunas, Lithuania) · 2026Article
- Favorable changes in health- and work-related factors and subsequent work ability in midlife and older social and health care employees.International archives of occupational and environmental health · 2026Article
- Roots and Shoots: A Pilot Parallel Randomised Controlled Trial Assessing the Feasibility and Acceptability of a Nature-Based Self-Help Intervention for Low Wellbeing.Behavioral sciences (Basel, Switzerland) · 2025Article
- Sleep disturbances, shift work, and epigenetic ageing in working-age adults: findings from the Young Finns study.Clinical epigenetics · 2025Article
- Cannabis use and sleep problems among young adults by mental health status: A prospective cohort study.Addiction (Abingdon, England) · 2025Article
- The Interplay Between Sleep and Safety Outcomes in the Workplace: A Scoping Review and Bibliographic Analysis of the Literature.International journal of environmental research and public health · 2025Article
- What alleviates the harmful effect of strain on recovery from work of 4478 health and social services workers? A cross-sectional study.Journal of advanced nursing · 2025Article
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- Association of reported sleep disturbances with objectively assessed mild cognitive impairment among adults in the United States.SAGE open medicine · 2025Article
- Lifestyle Behaviors and their Impact on Sleep Quality and Health-Related Quality of Life Among First-Year University Students in Vietnam.International journal of preventive medicine · 2025Article
- Sleep disturbance and brain health in professional association footballers.Frontiers in sports and active living · 2025Article
- Development and validation of a scale for the assessment of the knowledge-attitude-practice of parents towards children snoring.BMC primary care · 2024Review
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- Translating and establishing the psychometric properties of the Jenkins Sleep Scale for Arabic-speaking individuals.BMC psychiatry · 2024Article
- Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
7 authors at 4 institutions in 2 countries.
Funding
Abstract
objectivesTo assess the internal consistency and construct validity of the Finnish translation of the Jenkins Sleep Scale (JSS) in a large healthy working-age population with diverse work characteristics.
designSurvey-based cross-sectional cohort study.
settingSurvey conducted by an institute of occupational health.
participantsEmployees of 10 towns and 6 hospital districts. PRIMARY AND SECONDARY OUTCOME MEASURES: The internal consistency defined by a Cronbach's alpha. Exploratory and confirmatory factor analyses to evaluate the construct structure of the JSS.
resultsOf 81 136 respondents, 14 890 (18%) were men and 66 246 (82%) were women. Their average age was 52.1 (13.2) years. Of the respondents, 41 823 (52%) were sleeping 7 or less hours per night. The mean JSS total score was 6.4 (4.8) points. The JSS demonstrated high internal consistency with an alpha of 0.80 (lower 95% confidence limit 0.80). Exploratory factor analysis supported a one-factor solution with eigenvalue of 1.94. Confirmatory factor analysis showed that all four items were positively correlated with a single common factor explaining 44%-61% of common factor's variance.
conclusionsThe Finnish translation of JSS was found to be a unidimensional scale with good internal consistency. As such, the scale may be recommended as a practicable questionnaire when studying sleep difficulties in a healthy working-age population.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.