Pittsburgh Sleep Quality Index
Also known as: PSQI
Facts (64)
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Investigating the impact of sleep quality on cognitive functions ... frontiersin.org 59 facts
measurementThe correlation between Pittsburgh Sleep Quality Index (PSQI) scores and Raven's Progressive Matrices (RPM) performance is -0.25 (p < 0.001).
referenceThe study 'Investigating the impact of sleep quality on cognitive functions' utilized a moderation analysis to test whether the relationship between sleep quality (PSQI scores) and cognitive performance (measured by RAVLT, Stroop Test, RPM, and WCST) differs significantly between university students in Tokyo and London.
measurementThe correlation coefficient (r) between Pittsburgh Sleep Quality Index (PSQI) scores and Rey Auditory Verbal Learning Test (RAVLT) performance is -0.32 (p < 0.001).
measurementThe relationship between Pittsburgh Sleep Quality Index (PSQI) scores and Raven's Progressive Matrices (RPM) performance does not differ significantly between students in Tokyo and London (β = −0.05, p = 0.32).
measurementUniversity students in Tokyo reported significantly poorer sleep quality (Mean PSQI = 9.2, SD = 3.0) compared to university students in London (Mean PSQI = 7.8, SD = 3.3) with a p-value < 0.001 and Cohen's d = 0.44.
procedureThe study used the Pittsburgh Sleep Quality Index (PSQI), actigraphy, and a battery of cognitive assessments including the Rey Auditory Verbal Learning Test (RAVLT), Stroop Test, Raven's Progressive Matrices (RPM), and Wisconsin Card Sorting Test (WCST) to measure sleep and cognitive performance.
claimThe magnitude of negative correlations between sleep quality and cognitive performance is consistently larger in Tokyo than in London for all cognitive measures, suggesting the impact of sleep quality on cognitive performance may be more pronounced among university students in Tokyo.
claimIn the moderation analysis conducted by the study 'Investigating the impact of sleep quality on cognitive functions', the variable β (PSQI) represents the direct effect of sleep quality on cognitive performance controlling for city, β (City) represents the direct effect of city on cognitive performance controlling for sleep quality, and β (PSQI x City) represents the interaction term indicating whether the relationship between sleep quality and cognitive performance differs between Tokyo and London.
measurementThe correlation between Pittsburgh Sleep Quality Index (PSQI) scores and Stroop Test performance is -0.28 (p < 0.001), indicating a weak to moderate negative relationship between sleep quality and attention and executive function.
measurementThe correlation between Pittsburgh Sleep Quality Index (PSQI) scores and Raven's Progressive Matrices (RPM) performance is −0.30 in Tokyo and −0.15 in London.
measurementThe correlation between Pittsburgh Sleep Quality Index (PSQI) scores and Wisconsin Card Sorting Test (WCST) performance is −0.35, which is statistically significant at p < 0.001.
measurementA moderation analysis comparing Tokyo and London showed that the relationship between Pittsburgh Sleep Quality Index (PSQI) scores and Rey Auditory Verbal Learning Test (RAVLT) performance was significantly stronger in Tokyo (β = -0.35, p < 0.001) than in London (β = -0.15, p < 0.05).
measurementIn London, the correlation between Pittsburgh Sleep Quality Index (PSQI) scores and Raven's Progressive Matrices (RPM) performance is marginally significant at p = 0.04, while other cognitive correlations are significant at p < 0.01 or p < 0.001.
claimIn the Pittsburgh Sleep Quality Index (PSQI), a global score is calculated from seven component scores, where higher scores indicate diminished sleep quality.
measurementHigher Pittsburgh Sleep Quality Index (PSQI) scores, which indicate poorer sleep quality, are associated with lower performance on the Rey Auditory Verbal Learning Test (RAVLT), Stroop Test, Raven's Progressive Matrices (RPM), and Wisconsin Card Sorting Test (WCST) (p < 0.001).
measurementIn a moderation analysis of university students in Tokyo and London, the relationship between sleep quality (measured by PSQI) and RAVLT performance showed a standardized regression coefficient (β) of -0.35 (p < 0.001), indicating that poorer sleep quality is associated with lower verbal learning and memory scores across both cities.
claimUniversity students in Tokyo and London exhibit an inverse relationship between sleep quality and cognitive performance, where poorer sleep quality (indicated by higher Pittsburgh Sleep Quality Index scores) is associated with lower performance on cognitive tests.
measurementThe Pittsburgh Sleep Quality Index (PSQI) score significantly predicts performance on the Stroop Test (β = -0.15, p < 0.001) after controlling for demographic variables, indicating that poor sleep quality has an independent negative influence on attention and executive function.
measurementThe interaction between Pittsburgh Sleep Quality Index (PSQI) scores and city location significantly affects Rey Auditory Verbal Learning Test (RAVLT) performance (β = −0.20, p = 0.03), indicating the relationship between sleep quality and verbal memory differs between Tokyo and London.
measurementThe correlation between Pittsburgh Sleep Quality Index (PSQI) scores and WCST performance is −0.42 (p < 0.001) for students in Tokyo and −0.28 (p < 0.001) for students in London.
measurementThe correlation between Pittsburgh Sleep Quality Index (PSQI) scores and Raven's Progressive Matrices (RPM) performance is −0.25, which is statistically significant at p < 0.001.
measurementThe correlation between Pittsburgh Sleep Quality Index (PSQI) scores and the Rey Auditory Verbal Learning Test (RAVLT) is r = -0.32 (p < 0.001); the correlation with the Stroop Test is r = -0.28 (p < 0.001); the correlation with Raven's Progressive Matrices (RPM) is r = -0.25 (p < 0.001); and the correlation with the Wisconsin Card Sorting Test (WCST) is r = -0.35 (p < 0.001).
measurementPoorer sleep quality, as measured by the Pittsburgh Sleep Quality Index (PSQI), is significantly associated with slower Stroop Test performance (β = −0.25, p < 0.001) across both Tokyo and London student populations.
measurementIn regression analyses predicting cognitive performance from Pittsburgh Sleep Quality Index (PSQI) scores, the standardized regression coefficient (β) for the RAVLT is -0.20 (SE 0.05, p < 0.001), for the Stroop Test is -0.15 (SE 0.04, p < 0.001), for the RPM is -0.12 (SE 0.03, p < 0.01), and for the WCST is -0.23 (SE 0.06, p < 0.001).
measurementThe correlation between Pittsburgh Sleep Quality Index (PSQI) scores and Wisconsin Card Sorting Test (WCST) performance is -0.42 in Tokyo and -0.28 in London, indicating a stronger negative relationship between sleep quality and cognitive flexibility in Tokyo.
measurementThe Pittsburgh Sleep Quality Index (PSQI) score significantly predicts performance on the Wisconsin Card Sorting Test (WCST) (β = -0.23, p < 0.001) after controlling for demographic variables, indicating that sleep quality independently impacts cognitive flexibility and set-shifting abilities.
measurementThe correlation between Pittsburgh Sleep Quality Index (PSQI) scores and Stroop test performance is −0.35 (p < 0.001) for students in Tokyo and −0.20 (p < 0.01) for students in London.
claimRegression analyses indicate that Pittsburgh Sleep Quality Index (PSQI) scores significantly predict performance on cognitive measures (RAVLT, Stroop Test, RPM, and WCST) even after controlling for demographic variables (age, gender, socioeconomic status) and actigraphy-measured sleep duration and efficiency.
measurementThe Pittsburgh Sleep Quality Index (PSQI) score significantly predicts performance on the Raven's Progressive Matrices (RPM) (β = -0.12, p < 0.01) after controlling for demographic variables, suggesting that sleep quality independently contributes to non-verbal reasoning abilities.
measurementStudents in Tokyo exhibited lower sleep quality than students in London, as evidenced by average Pittsburgh Sleep Quality Index (PSQI) scores reflecting a more significant occurrence of sleep disturbances.
claimThe Pittsburgh Sleep Quality Index (PSQI) is used to assess sleep quality in research studies.
measurementThe correlation between Pittsburgh Sleep Quality Index (PSQI) scores and Wisconsin Card Sorting Test (WCST) performance is -0.35 (p < 0.001).
measurementThe interaction term (PSQI x City) for the impact of sleep quality on Wisconsin Card Sorting Test (WCST) performance was measured at β = −0.12 with a p-value of 0.09, indicating the result is not statistically significant at the conventional p < 0.05 level.
measurementThe correlation between Pittsburgh Sleep Quality Index (PSQI) scores and Rey Auditory Verbal Learning Test (RAVLT) performance is -0.32 (p < 0.001), indicating a moderate negative relationship between sleep quality and verbal learning and memory.
measurementThe correlation coefficient (r) between Pittsburgh Sleep Quality Index (PSQI) scores and Stroop Test performance is -0.28 (p < 0.001).
procedureThe study utilized an integrated methodology by combining subjective sleep quality data from the Pittsburgh Sleep Quality Index (PSQI) with objective sleep data obtained through actigraphy.
claimHigher Pittsburgh Sleep Quality Index (PSQI) scores are associated with lower Raven's Progressive Matrices (RPM) scores, indicating that poorer sleep quality is linked to poorer non-verbal reasoning.
referenceThe Pittsburgh Sleep Quality Index (PSQI) is a validated instrument used to assess multiple aspects of sleep quality over the previous month, consisting of 19 items that generate seven component scores: subjective sleep quality, sleep latency, sleep duration, habitual sleep efficiency, sleep disturbances, usage of sleeping medications, and daytime dysfunction.
claimSignificant negative correlations exist between Pittsburgh Sleep Quality Index (PSQI) scores and cognitive performance, indicating that poorer sleep quality correlates with diminished cognitive abilities across domains.
claimHigher Pittsburgh Sleep Quality Index (PSQI) scores are associated with lower Wisconsin Card Sorting Test (WCST) scores, indicating that poorer sleep quality is linked to poorer cognitive flexibility and more perseverative errors.
measurementThe relationship between Pittsburgh Sleep Quality Index (PSQI) scores and Stroop Test performance does not differ significantly between students in Tokyo and London (β = −0.10, p = 0.21).
claimIn the Pittsburgh Sleep Quality Index, higher global scores indicate diminished sleep quality.
claimHigher Pittsburgh Sleep Quality Index (PSQI) scores, which indicate poorer sleep quality, are associated with lower performance on cognitive tests, as evidenced by negative standardized regression coefficients (β) across all measured cognitive assessments.
formulaIn the Pittsburgh Sleep Quality Index (PSQI), scores range from 0 to 21, with higher scores indicating poorer sleep quality.
measurementThe correlation between Pittsburgh Sleep Quality Index (PSQI) scores and RAVLT performance is −0.40 (p < 0.001) for students in Tokyo and −0.25 (p < 0.01) for students in London.
measurementIn a moderation analysis of university students in Tokyo and London, the interaction between sleep quality (PSQI) and city on RAVLT performance showed a standardized regression coefficient (β) of -0.20 (p = 0.03), suggesting the relationship between sleep quality and verbal learning and memory is significantly different between the two cities.
measurementThe correlation between Pittsburgh Sleep Quality Index (PSQI) scores and RPM performance is −0.30 (p < 0.001) for students in Tokyo and −0.15 (p = 0.04) for students in London.
measurementThe relationship between Pittsburgh Sleep Quality Index (PSQI) scores and Stroop Test performance does not differ significantly between Tokyo and London (β = −0.10, p = 0.21), suggesting the magnitude of the effect of sleep quality on attention and executive function is consistent across both cultural contexts.
measurementPoorer sleep quality, as measured by the Pittsburgh Sleep Quality Index (PSQI), is significantly associated with lower Raven's Progressive Matrices (RPM) non-verbal reasoning scores (β = −0.20, p < 0.001) across both Tokyo and London student populations.
measurementThe correlation between Pittsburgh Sleep Quality Index (PSQI) scores and Stroop Test performance is −0.35 in Tokyo and −0.20 in London.
procedureResearchers utilized multivariate regression analyses, such as SPSS or R, to investigate the connection between sleep quality, assessed through Pittsburgh Sleep Quality Index (PSQI) scores, and cognitive performance while controlling for variables including age, gender, academic discipline, stress levels, and physical activity.
claimThe study of 400 university students in Tokyo and London found significant negative correlations between Pittsburgh Sleep Quality Index (PSQI) scores and cognitive performance, indicating that poorer sleep quality correlates with diminished cognitive abilities across domains.
claimPoor sleep quality, as measured by the Pittsburgh Sleep Quality Index (PSQI), is significantly associated with lower cognitive performance across domains including verbal learning and memory (measured by the Rey Auditory Verbal Learning Test), attention and executive function (measured by the Stroop Test), non-verbal reasoning (measured by the Raven's Progressive Matrices), and cognitive flexibility (measured by the Wisconsin Card Sorting Test).
measurementThe correlation between Pittsburgh Sleep Quality Index (PSQI) scores and Rey Auditory Verbal Learning Test (RAVLT) performance is −0.40 in Tokyo and −0.25 in London.
measurementThe Pittsburgh Sleep Quality Index (PSQI) score significantly predicts performance on the Rey Auditory Verbal Learning Test (RAVLT) (β = -0.20, p < 0.001) after controlling for demographic variables, indicating that poorer sleep quality independently predicts lower verbal memory and learning performance.
claimThe impact of sleep quality on cognitive functions, as measured by correlations between Pittsburgh Sleep Quality Index (PSQI) scores and cognitive assessments, is more pronounced among students in Tokyo compared to students in London.
claimA study investigating university students in Tokyo, Japan, and London, UK, found significant negative associations between sleep quality (measured by the Pittsburgh Sleep Quality Index) and cognitive performance across domains including verbal learning and memory (RAVLT), attention and executive function (Stroop Test), non-verbal reasoning (RPM), and cognitive flexibility (WCST).
claimResearchers used the Pittsburgh Sleep Quality Index (PSQI) to assess sleep quality in relation to cognitive performance.
measurementThe interaction term between sleep quality (measured by the Pittsburgh Sleep Quality Index) and city location (Tokyo vs. London) on Wisconsin Card Sorting Test (WCST) performance resulted in β = −0.12 and p = 0.09, indicating the result is not statistically significant at the conventional p < 0.05 level.
Short- and long-term health consequences of sleep disruption dovepress.com May 19, 2017 3 facts
claimIn adolescents, higher sleep disturbance scores on the Pittsburgh Sleep Quality Index (PSQI) are associated with higher cholesterol, higher body mass index (BMI), higher systolic blood pressure, and an increased risk of hypertension.
measurementAn observational, cross-sectional study found that poor global sleep-quality scores on the Pittsburgh Sleep Quality Index (PSQI) were significantly related to the presence of metabolic syndrome, as well as to waist circumference, Body Mass Index (BMI), percentage of body fat, serum levels of insulin and glucose, and estimated insulin resistance.
measurementA study of 61 maternal caregivers of young children with bronchopulmonary dysplasia found that 80% of mothers had clinically disturbed sleep, as measured by the Pittsburgh Sleep Quality Index (PSQI).
U shaped association between sleep duration and long ... nature.com by F Feng · 2025 1 fact
claimThe study's sleep variables were collected through self-reported data rather than objective measurements, which may introduce reporting bias and fail to capture the multidimensional nature of sleep health assessed by validated instruments like the Pittsburgh Sleep Quality Index (PSQI).
The Profound Interplay Between Sleep and Cognitive Function creyos.com Aug 14, 2025 1 fact
claimCreyos Health offers standardized sleep questionnaires, such as the Pittsburgh Sleep Quality Index (PSQI), to assess patients' sleep quality, patterns, and disturbances over time to inform treatment interventions for sleep disorders.