COMPARISON OF OUTCOMES REPORTED BY INDIVIDUALS WITH SCHIZOPHRENIA RESIDING IN THE COMMUNITY AND OBJECTIVE OUTCOMES REPORTED BY CAREGIVERS

Author(s)

Barr J, Schumacher G, Ohman S, Mason ENortheastern University, Boston, MA, USA

OBJECTIVES: Compare patient- and caregiver-reported outcomes on 25 objective questions contained within the 51-item Schizophrenia Outcomes Assessment Project (SOAP) quality of life survey. METHODS: In total, 1500 community-residing individuals with schizophrenia in five states (Massachusetts, South Carolina, Wisconsin, Arizona, Washington) completed SOAP-51 survey at baseline and weeks four, five, and 12. Previously, factor analysis indicated that SOAP-51 had eight factors (satisfaction, self concept, work/role, mental health, interpersonal, medication effects, activities of daily living, and physical function) with Cronbach alphas ranging from 0.728-0.937 and test/retest intraclass correlations >0.70 for all but one factor. An expert panel identified 25 SOAP items that could be objectively measured. This 25-item subset was given to each patient's primary caregiver concurrent with each patient's SOAP-51 administration. Caregivers were asked to answer each item in two ways: 1) What is your objective response?; and 2) What do you think is the patient's response? Three correlation sets were performed for week-four responses: a) caregiver's objective responses compared to caregiver's estimation of patient's responses (Correlation A); b) caregiver's objective response compared to patient's responses (Correlation B); and c) caregiver's estimation of patient's responses compared to patient's responses (Correlation C). RESULTS: Strongest correlations occurred in Correlation A [factor scores for caregiver's objective responses compared to caregiver's estimation of patient's responses (0.534-0.862)]; lowest for Correlation B [caregiver's objective response compared to patient's responses (-0.292-0.367)]; and intermediate for Correlation C [caregiver's estimation of patient's responses compared to patient's responses (-0.353-0.564)]. Physical function factor correlations were the strongest in Correlation A (0.862), but the lowest in Correlation B (-0.292) and C (-0.353). CONCLUSIONS: Caregiver objective assessments of individuals with schizophrenia can vary markedly from patient-reported outcomes, but asking caregivers to view the world through the eyes of the patient closes this gap. Asking caregivers to assume a patient's perspective may improve patient-caregiver communications.

Conference/Value in Health Info

2005-05, ISPOR 2005, Washington, DC, USA

Value in Health, Vol. 8, No. 3 (May/June 2005)

Code

PMH61

Topic

Patient-Centered Research

Topic Subcategory

Patient-reported Outcomes & Quality of Life Outcomes

Disease

Mental Health

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