Psychometric Properties and Factor Analysis of Family Accommodation Scale For Obsessive Compulsive Disorder-Interviewer-Rated-Thai Version (FAS-T)

Abstract

Obsessive compulsive disorder (OCD) is a longstanding and debilitating psychiatric disorder which is related to a level of distress in family members of patients who suffer from it. The Family Accommodation Scale (FAS) for OCD helps medical personnel have a clearer and deeper understanding of the pattern of family accommodation. This study aimed to translate FAS into Thai and examine its psychometric properties and factor analysis. Patients and Methods: There were fifty participants who were relatives of OCD patients. Demographic data were collected along with completion of the FAS-T, the Patient Health Questionnaire (PHQ-9), the Pictorial Thai Quality of Life (PTQL), and the Thai Florida Obsessive Compulsive Inventory (FOCI-T), and then analyzed. The severity scales of FOCI-T from 44 OCD patients who had relatives participating in this study were collected from medical records and examined. Psychometric properties and factor analysis of FAS-T were tested. Results:The average total score of FAS-T was 8.36±8.77 ranging between 0 to 25. The mean scores of FOCI-severity scale in relatives, PHQ-9, PTQL, and FOCI-severity scale in OCD patients, were 1.04±1.97, 4.04±3.73, 52.31±13.99, 8.95±4.36, respectively. The Cronbach's coefficient alpha of FAS-T was 0.84, which demonstrated good internal consistency. The item-level CVI and scalelevel CVI were at an excellent level. The Spearman's rho between the FAS and FOCI symptom checklist, FOCI severity score, and PHQ-9 PTQL, were weakly correlated which implied acceptable discriminant validity. Exploratory Factor Analysis (EFA) suggested a three-factor solution as participation, modification, and facilitation. Conclusion:The Family Accommodation Scale for Obsessive-Compulsive Disorder-Interviewer-Rated -Thai version is a psychometrically reliable and valid measure for assessing accommodation in family members of OCD patients.