Validation of a 3-factor scoring model for the Pittsburgh sleep quality index in older adults.
|Validation of a 3-factor scoring model for the Pittsburgh sleep quality index in older adults.
|Year of Publication
|Cole JC, Motivala SJ, Buysse DJ, Oxman MN, Levin MJ, Irwin MR
|Aged, Factor Analysis, Statistical, Female, Humans, Male, Middle Aged, Reproducibility of Results, Severity of Illness Index, Sleep Wake Disorders, Surveys and Questionnaires
STUDY OBJECTIVES: The Pittsburgh Sleep Quality Index (PSQI) is widely used to assess subjective sleep disturbances in psychiatric, medical, and healthy adult and older adult populations. Yet, validation of the PSQI single-factor scoring has not been carried out.
DESIGN: The PSQI was administered as a self-report questionnaire. Using a cross-validation approach, scores from the PSQI were analyzed with exploratory and confirmatory factor analyses.
SETTING: San Diego, Denver, and Los Angeles community-based clinics.
PARTICIPANTS: Community-dwelling depressed and nondepressed adults older that 60 years of age (N = 417)
MEASUREMENTS AND RESULTS: Results yielded a 3-factor scoring model that obtained a measure of perfect fit and was significantly better fitted than either the original single-factor model or a 2-factor model. Components of the 3 factors were characterized by the descriptors sleep efficiency, perceived sleep quality, and daily disturbances.
CONCLUSIONS: These findings validate the factor structure of the PSQI and demonstrate that a 3-factor score should be used to assess disturbances in three separate factors of subjective sleep reports.
|AG18367 / AG / NIA NIH HHS / United States
MH55253 / MH / NIMH NIH HHS / United States
T32-MH19925 / MH / NIMH NIH HHS / United States