Measurement invariance for two time points was evaluated by configural, metric and scalar invariance. The factor structure of the GHQ-28 was evaluated by exploratory factor analysis (EFA), and a confirmatory factor analysis (CFA) was used to determine the goodness of fit to the original structure of the outcome measurement. Internal consistency was analysed using Cronbach’s alpha. The Kaiser-Meyer-Olkin (KMO) test was used to test the sampling adequacy for exploratory factor analysis, and the Bartlett’s test of sphericity was used to test equal variances. The purpose of this study was to explore the psychometric properties of the GHQ-28 when applied in the stroke population included in the randomized controlled trial “Psychosocial well-being following stroke”, by evaluating the internal consistency, exploring the factor structure, construct validity and measurement invariance.ĭata were obtained from 322 individuals with a stroke onset within the past month. The factor structure of the Norwegian version of GHQ-28 has not previously been examined when applied to a stroke population. Thus, a valid and reliable instrument that is appropriate for the stroke population is required. Due to the consequences of these challenges, psychosocial well-being should be considered an important outcome of the stroke rehabilitation. Several studies have documented the variety of post-stroke psychosocial challenges, which are complex, multifaceted, and affect a patient’s rehabilitation and recovery.
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