ArticleNature and science of sleep2026
The Sleep Quality of Han Chinese and Tibetan Firefighters at High Altitude: A Field Study.
Article in Nature and science of sleep, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
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.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
0 citing papers in PubMed.
No citing paper in PubMed yet.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
9 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Background: The sleep quality of Han Chinese and Tibetan firefighters at high altitude remains poorly understood. This study investigates the prevalence of sleep disturbances in these groups and whether ethnicity affects sleep quality in these two populations. Methods: Male firefighters were recruited from China Fire and Rescue stations at high altitude of 500 m, 2570 m, and 4509 m in Southwest China. The Pittsburgh Sleep Quality Index (PSQI) assessed sleep quality, considering scores >5 as poor sleep quality. Symptoms of anxiety and depression were evaluated using the 7-item Generalized Anxiety Disorder Questionnaire (GAD-7) and the 9-item Patient Health Questionnaire (PHQ-9). Results: As altitude increased, the total PSQI scores of Han Chinese firefighters showed a non-statistically significant rise: 4 (2-5) at 500 m, 4 (3-6.75) at 2570 m, and 5 (2.75-6) at 4509 m. Poor sleep quality prevalence also rose: 23%, 31%, and 44%, respectively. In contrast, the sleep quality of Tibetan firefighters remained relatively stable and was better than that of their Han Chinese counterparts. Furthermore, the GAD-7 and PHQ-9 scores were higher in Han Chinese firefighters compared to Tibetan firefighters. The PSQI score was positively correlated with GAD-7 scores ( Conclusion: This study suggests that Han Chinese firefighters in this field sample across these stations are at greater risk of poor sleep quality than Tibetan firefighters, with elevated GAD-7 scores being a potential contributing factor for poor sleep quality.
Indexed as
Identifiers
What OpenQuestion holds
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.