Psychometric properties of the Family Accommodation Scale for Obsessive-Compulsive Disorder-Patient Version

In obsessive-compulsive disorder (OCD), family accommodation is a frequently occurring phenomenon that has been linked to attenuated treatment response, increased obsessive-compulsive symptom severity, and lower levels of functioning. No patient-report version of family accommodation exists, with available measures relying on relatives as informants. However, adult patients with OCD often present to clinical services alone, frequently making it impractical to obtain information from these informants. Consequently, a standardized patient-reported measure of family accommodation proves salient in clinical practice. The present study examined the psychometric properties of the Family Accommodation Scale for Obsessive-Compulsive Disorder-Patient Version (FAS-PV). Sixty-one adults with OCD were administered clinician-rated measures of OCD symptom severity and self-report questionnaires examining functional impairment, family functioning, and emotional/behavioral difficulties. Fifty-four relatives completed self-report measures assessing family accommodation and family functioning. The majority of the adult OCD participants (89%) endorsed at least 1 type of accommodating behavior in the previous week. The FAS-PV total score demonstrated good internal consistency and test-retest reliability. Convergent validity was evidenced by strong associations with scores on another measure of family accommodation, OCD symptom severity, OCD-related family functioning, anxiety, and functional impairment. Divergent validity was supported through nonsignificant correlations with depressive symptoms and impulsivity. The FAS-PV did not significantly differ from the relative-reported measure of family accommodation in terms of the internal consistency or mean of the total scores. Ultimately, the FAS-PV scores demonstrated sound psychometric properties and validity in assessing family accommodation from the patient's perspective, encouraging its use in research and clinical practice.