Confirmatory Factor Analysis of the Pittsburgh Sleep Quality Index in Rheumatoid Arthritis Patients
Year: 2012
Type: article
Study design: Observational Study
Abstract: The purpose of this research was to evaluate the factor structure of the Pittsburgh Sleep Quality Index (PSQI) in rheumatoid arthritis (RA). The sample included 107 patients with RA, 88 females and seven males, with an average age of 56.09 years, recruited from the greater Southern California area. Confirmatory factor analysis evaluated single, two- and three-factor models. The single factor solution yielded a poor fit to the data. While the three-factor solution had the best fit, the two-factor solution, comprised of sleep efficiency and perceived sleep quality factors, was optimal because it had very good fit, and acceptable reliability for its individual factors. Clinical indices were consistently correlated with the sleep quality factor, but not with the sleep efficiency factor.
Source: Behavioral Sleep Medicine
Authors: Perry M. Nicassio, Sarah R. Ormseth, Mara K. Custodio, Richard Olmstead, Michael H. Weisman, Michael R. Irwin
Language: English
Topic: Sleep and related disorders
Subfield: Experimental and Cognitive Psychology
Field: Psychology
Domain: Social Sciences
Open Access status: green
Awards: G1189756484, UCLA Clinical and Translational Science Institute, Behavioral Treatments for Rheumatoid Arthritis, Aging: Sleep and Inflammatory Mechanisms in Depression Prevention, Social Isolation and Sleep Disturance in Aging: Inflammatory Mechanisms, G2663518188, G768521719, UCLA Older Americans Independence Center, G88096259, Tai Chi Effects on Chronic Insomnia in Breast Cancer Survivors: Immune Mechanisms, Chronic Moderate Sleep Restriction in Older Long and Older Average Sleepers
OpenAlex ID: W2095063129