ArticleOsteoarthritis and cartilage open2026
Changes in sleep and clinical outcomes in hip osteoarthritis: A longitudinal secondary analysis of a randomised controlled trial.
Article in Osteoarthritis and cartilage open, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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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.
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Authors and funding
9 authors.
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Abstract
Objective: To investigate whether improvements in sleep quality and duration are associated with improvements pain and physical function in people with hip osteoarthritis (OA) following exercise. Methods: Data from 185 participants with hip OA, randomized to an exercise intervention were pooled and analysed. Independent variables were changes in sleep quality using the Pittsburgh Sleep Quality Index (PSQI; 0-21, higher scores indicating poorer sleep) and sleep duration (hours) at 3 and 9 months. Outcomes were changes in hip pain severity (11-point numerical rating scale; 0-10) and physical function (Western Ontario and McMaster Universities Osteoarthritis Index; 0-68). Associations were examined using linear regression models, adjusted for baseline values and covariates, and according to baseline sleep quality (PSQI >5 = poor sleep; ≤5 = good sleep). Results: At 3 months, each 1-point improvement in sleep quality was associated with reduced pain (-0.21 units; 95% CI: -0.32 to -0.09) and improved physical function (-1.45 units; 95% CI: -2.01 to -0.89). Each 1-h increase in sleep duration was associated with reduced pain (-0.34 units; 95% CI: -0.69 to 0.02) and improved physical function (-3.23 units, 95% CI -4.97 to -1.49). Similar associations were observed at 9 months. There were no statistically significant interactions between baseline sleep quality status (p = 0.055 to 0.994) and pain/physical function. Conclusion: Improvements in sleep quality and duration are associated with small improvements in pain and physical function following exercise. These relationships were consistent over time but of uncertain clinical relevance.
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