Content validity and reliability of the modified Japanese version of the Healthcare Providers Patient-Activation Scale: self-reported adherence to patient-centered physical therapy scale

• Published in: Physiotherapy theory and practice Vol. 38; no. 13; pp. 1 - 3089
• Main Author: Takasaki, Hiroshi
• Format: Journal Article
• Language: English
• Published: England Taylor & Francis Ltd 18.11.2022
• Subjects: Adherence; Health care; Japanese language; Patient-centered care; Physical therapists; Physical therapy; Physiotherapy; Polls & surveys; Reliability; Self report; Validity; Adherence; face validity; patient-centered approach; physiotherapy; reliability
• ISSN: 0959-3985; 1532-5040
• DOI: 10.1080/09593985.2021.1987602

Modifications to the Healthcare Providers Patient-Activation Scale (HP-PAS), which evaluates attitudes toward the importance of using a patient-centered approach (PCA), are required. Content validity and reliabilities of a scale developed from the HP-PAS to evaluate self-reported adherence to patient-centered physical therapy were preliminarily investigated. A total of 86 Japanese physical therapists completed the validity assessments in an anonymous survey. Among them, 53 completed the reliability assessments in a named survey. The HP-PAS was modified to mark the most suitable frequency for each item, creating an 11-point scale. For the validity assessments, the participants assigned each item to a therapist-centered approach or PCA using a 5-point scale. Content validity was considered when the proportion of scores 4 and 5 ("possibly" or "definitely" a PCA) with respect to the total number of scores was > 50%. Ceiling and flooring effects were considered when the response proportions of scores of 10 and 0, respectively, on an 11-point scale were > 20%. Items with an intraclass correlation coefficient (ICC) < 0.4 in the test-retest reliability from the item list were excluded. Of the 20 items, 6 were excluded, developing a 14-item self-reported adherence to a patient-centered physical therapy scale (SAPCPTS), which exhibited good internal consistency (Cronbach's = 0.95, 95% confident intervals [CIs] = 0.93-0.96) and test-retest reliability (ICC = 0.84, 95% CIs = 0.75-0.91). This study identified that the 14-item SAPCPTS demonstrated preliminary evidence of content validity and reliability.