Hiroshi Takasaki1,2, Toby Hall3. 1. Department of Physical Therapy, Saitama Prefectural University , Koshigaya, Saitama, Japan. 2. Department of Rehabilitation, Aoki Chuo Clinic , Kawaguchi, Saitama, Japan. 3. School of Physiotherapy and Exercise Science, Curtin University , Perth, Western Australia, Australia.
Abstract
Background: The Patient Attitudes and Beliefs Scale (PABS) is a self-reporting questionnaire with 12 items on a 5-point Likert scale for patient's attitude towards shared decision making but its adaptation into Japanese has not been undertaken. Objectives: To develop a Japanese version of the PABS (PABS-J) through translation into Japanese and evaluation of an appropriate scoring system and unidimensionality using Rasch analysis and test-retest reliability. Design: This study included a cross-cultural validation step and investigations of questionnaire validity and reliability. Method: One-hundred-ten patients with musculoskeletal disorders referred to physiotherapy completed the Japanese draft of the PABS before the initial session of physiotherapy. Seventy-five of the 110 participants completed the PABS twice, on a separate day. Items that violated pre-determined criteria of unidimensionality and test-retest reliability (Quadratic-weighted κ ≦ 0.4) were removed. Further, the 110 participants identified one of the four stages of readiness towards shared decision making and correlation with the score of the PABS-J was preliminarily investigated as concurrent validity. Results/Findings: Rasch analysis confirmed unidimensionality of six items and appropriateness of a 3-point scale. Moderate test-retest reliability of the PABS-J was detected (Intra-class correlation coefficient = 0.70). A statistically significant and positive but weak correlation between the PABS-J scores and the four stages of readiness towards shared decision making was detected (ρ = 0.20, P = 0.03). Conclusions: The current study demonstrated partial validity and reliability of the PABS-J with six items and 3-point scale. This questionnaire will be a foundation for further investigations attitude towards shared decision making.
Background: The Patient Attitudes and Beliefs Scale (PABS) is a self-reporting questionnaire with 12 items on a 5-point Likert scale for patient's attitude towards shared decision making but its adaptation into Japanese has not been undertaken. Objectives: To develop a Japanese version of the PABS (PABS-J) through translation into Japanese and evaluation of an appropriate scoring system and unidimensionality using Rasch analysis and test-retest reliability. Design: This study included a cross-cultural validation step and investigations of questionnaire validity and reliability. Method: One-hundred-ten patients with musculoskeletal disorders referred to physiotherapy completed the Japanese draft of the PABS before the initial session of physiotherapy. Seventy-five of the 110 participants completed the PABS twice, on a separate day. Items that violated pre-determined criteria of unidimensionality and test-retest reliability (Quadratic-weighted κ ≦ 0.4) were removed. Further, the 110 participants identified one of the four stages of readiness towards shared decision making and correlation with the score of the PABS-J was preliminarily investigated as concurrent validity. Results/Findings: Rasch analysis confirmed unidimensionality of six items and appropriateness of a 3-point scale. Moderate test-retest reliability of the PABS-J was detected (Intra-class correlation coefficient = 0.70). A statistically significant and positive but weak correlation between the PABS-J scores and the four stages of readiness towards shared decision making was detected (ρ = 0.20, P = 0.03). Conclusions: The current study demonstrated partial validity and reliability of the PABS-J with six items and 3-point scale. This questionnaire will be a foundation for further investigations attitude towards shared decision making.
Entities:
Keywords:
Musculoskeletal pain; Rasch analysis; personal autonomy; reproducibility of results; shared decision making