Functional assessment of cancer therapy questionnaire for melanoma in the Serbian population: A factor analytic approach

Abstract

The aim of this study was to examine the psychometric properties of the Functional Assessment Cancer Therapy-Melanoma (FACT-M) questionnaire in the Serbian language. The FACT-M was translated into Serbian using the standard methodology after obtaining the licence from the Functional Assessment of Chronic Illness Therapy (FACIT) translation project team. This version of FACT-M was distributed to a cohort of consecutive patients with histologically confirmed high-risk skin melanoma treated at the tertiary referral center. To examine construct validity of the FACT-M in Serbian, we performed exploratory factor analysis (EFA) and confirmatory factor analysis (CFA). The FACT-General (FACT-G) did not fit the original 4-domain structure. Instead, we accepted a 7-domain structure which, aside from physical, emotional, social and functional well-being, had domains of 'friends' support', 'illness acceptance' and 'fear of death'. Melanoma scale (MS) and Melanoma surgery scale (MSS) did not fit the original one-dimensional structure. The MS was observed to have 4 domains: 'pain', 'skin problems', 'abdominal metastases' and 'other problems'. The MSS was observed to have 2 domains: 'having symptoms' and 'no symptoms'. It is suggested that the FACT-M questionnaire is analyzed using the newly extracted domains to examine quality of life of people with high-risk melanoma in Serbia.