Reliability and validity of the Chinese version of the Benefit Finding Questionnaire for people with mental disorders

Background: Benefit finding (BF) is correlated with mental health and recovery, and its presence will contribute to the recovery of patients with mental disorders. Most of the current tools for assessing BF in patients with somatic disorders are not adequate for patients with mental disorders. The present study proposes to introduce the Benefit Finding Questionnaire for People with Mental Disorders and to validate its psychometric properties. Methods: The Beaton translation model was used to translate and cross-culturally adjust the Japanese version of the Benefit Finding Questionnaire for People with Mental Disorders. A survey of 514 people with mental disorders was conducted from January 2022 to October 2022 using a general information questionnaire and a translated Chinese version of the Benefit Finding Questionnaire for People with Mental Disorders (BFQ-C) using a convenience sampling method. The quality of the questionnaire was examined in terms of item analysis, reliability, and validity. Results: The results of the item analysis showed that all items met the requirements. The interrater agreement of the BFQ-C was good, with an interrater agreement = 0.714; the values of the item-level content validity index ranged from 0.75 to 1.00; and the average of all item-level content validity index on the scale = 0.958. Exploratory factor analysis extracted three main factors “change in relationship with others,” “change in spirituality,” and “change in values and thinking styles”—and the cumulative variance contribution rate was 57.70%. The results of the confirmatory factor analysis were χ2/df of 2.194, Root Mean Square Error of Approximation of 0.075, and comparative fit index of 0.919, indicating that the model fitted well. The questionnaire had a Cronbach’ alpha of 0.936, a split reliability of 0.956, and a retest reliability of 0.939. Conclusion: The BFQ-C demonstrated good reliability and validity, and can be used to assess the BF level of people with mental disorders (e.g., anxiety disorders, depressive disorders, schizophrenia, and bipolar disorders) in China.