Development and psychometric testing of the Self-Care of Stroke Inventory

Abstract

Purpose To develop and evaluate the psychometric properties of the Self-Care of Stroke Inventory (SCSI). Materials and methods A cross-sectional, instrument development and the psychometric testing study was conducted. A 23-item self-report Self-Care of Stroke Inventory with 3 separate scales was developed. This study involved three stages: (a) Initial items generation; (b) Content and face validation; (c) Psychometric properties evaluation. The SCSI was validated by content validity, construct validity, convergent validity, internal consistency, and test-retest reliability. Results From the initial 80-item pool, 24 items of 3 scales in the SCSI were retained by the expert consultation and item analysis. The scale’s content validity was 0.976, 0.966, and 0.973. The EFA showed the total variance explained by the 3 scales of the SCSI were 73.417%, 74.281%, and 80.207%, respectively. The models of the 3 scales identified by EFA were all confirmed by the CFA. The SCSI scale shows evidence of good convergent validity. Cronbach’s αs were 0.830, 0.930, and 0.831. Test-retest reliability of the SCSI was excellent, with an intraclass correlation coefficient of 0.945, 0.907, and 0.837. Conclusions The final 23-item SCSI presents good psychometric properties and can be used to explore the self-care of stroke in community settings. IMPLICATIONS FOR REHABILITATION This study developed and validated the Self-Care of Stroke Inventory (SCSI). The SCSI contains the following 3 scales: the Self-care Maintenance of Stroke scale, the Self-care Monitoring of Stroke scale, and the Self-care Management of Stroke scale The 23-item SCSI demonstrated strong psychometric properties. The SCSI may be used to develop future programmes to promote self-care for stroke survivors and improve their rehabilitation outcomes.