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

PURPOSE

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 scale-level 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.