Validity and reliability of a checklist for patients with Behçet's disease based on the International Classification of Functioning, Disability and Health.

In 2020, we reported the "BD-checklist 92" for patients with Behçet's disease (BD) based on the International Classification of Functioning, Disability and Health. The purpose of the present study was to evaluate the validity and reliability of this checklist. Questionnaires using the "BD-checklist 92" and the 36-item Short Form Survey (SF-36) were sent to ten affiliated institutions. In total, 174 patients answered the questionnaire (response rate, 32.7%). Criterion validity was evaluated using the correlation coefficient between the number of problem categories extracted from the "BD-checklist 92" and the scores of the eight subscales and two components of the SF-36. Construct validity was assessed based on the number of problem categories extracted as an external criterion for the number of manifestations experienced and specific lesions. The comparison was performed using the Mann-Whitney U test. Cronbach's alpha coefficient was used to evaluate reliability. The number of problem categories in the "Body functions and structures", "Activities and participation", and "Environmental factors" components correlated significantly with all dimensions of the SF-36 questionnaire (P < 0.05 each). Construct validity showed that the number of manifestations experienced in all components (P < 0.001 each) and specific lesions in "Body functions and structures" and "All categories" (P = 0.002 and 0.050, respectively) contributed to an increased number of problems associated with BD. Cronbach's alpha coefficient for the "BD-checklist 92" was 0.926. This study confirmed the validity and reliability of the "BD-checklist 92".