ArticleNpj biological timing and sleep2026
Psychometric properties of the two-item Pittsburgh Sleep Quality Index (PSQI-2) in a cohort of community-dwelling older men: the MrOS sleep study.
Article in Npj biological timing and sleep, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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Who cites it
2 citing papers in PubMed.
- Performance of a two-item sleep quality measure (PSQI-2): a comprehensive evaluation in a multiethnic cohort (MESA Study).Research square · 2026Article
- Better Sleep Better Psychological Well-Being Among Older Adults: Evidence From the Chinese Longitudinal Healthy Longevity Survey (CLHLS).Journal of aging research · 2026Article
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1 author.
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Abstract
The Pittsburgh Sleep Quality Index (PSQI) is widely used, but can be impractical in large studies due to its length. The two-item version (PSQI-2) is a promising alternative, with underexplored longitudinal properties in older adults. We evaluated its validity against the full PSQI in the MrOS Sleep Study cohort of older men. Cross-sectional validity (Bland-Altman, ROC curves for PSQI > 5) and longitudinal properties (ICC, change score correlation, accuracy for ΔPSQI > 3) were assessed. The PSQI-2 showed a strong cross-sectional association with the full PSQI (b = 2.167, p < 0.001), explaining 72% of its variance. For identifying poor sleep quality, the PSQI-2 demonstrated excellent accuracy (AUC = 0.89) with an optimal cutoff of ≥2 (sensitivity=77.5%, specificity=84.5%). Longitudinally, both instruments showed moderate test-retest reliability (PSQI-2 ICC = 0.579; PSQI ICC = 0.639). The correlation between their change scores was strong (r = 0.682, p < 0.001), and the PSQI-2 showed reasonable accuracy (AUC = 0.754) in detecting clinically meaningful change (Δ PSQI > 3). The PSQI-2 is a valid and reliable tool for cross-sectional screening of poor sleep quality in older men at the cutoff of ≥2. It is also responsive to directional change over time and can identify individuals with clinically significant changes in sleep.
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Registered trials
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