The Indonesian version of the Medical Outcome Survey - Short Form 12 version 2 among patients with cardiovascular diseases

Aim. The aim of this study is to examine psychometric properties of the Indonesian version of Medical Outcome Survey Short Form 12 version 2 (SF12v2). Methods. A cross-sectional study was conducted in three primary healthcare units in Yogyakarta, Indonesia. Patients with cardiovascular diseases who were able to respond to questionnaires and provide their consent were invited. The validity test included face, content, discriminant, and construct validity. The internal consistency was used as the reliability indicator. Results. The item and subscale of content validity index were 0.97 and 0.83, respectively. The instrument had 100% for equivalence and clarity outcomes, whereas the readability outcome was 91.7%. More than 80% of participants agreed and considered SF12v2 understandable. The correlations among physical and mental subscales were substantial, supporting discriminant validity. The Bartlett test of sphericity was significant with the Kaiser-Meyer-Olkin test of 0.74. The principal component analysis resulted in eight components, explaining 88.4% of total variance. α coefficients for subscale were ranging from.58 to.81, whereas the physical and mental component summaries were.77 and.67, respectively. Conclusions. The Indonesian version of SF12v2 indicated a reliable and valid instrument. The SF12v2, available in a Bahasa Indonesia version, is an applicable instrument to assess quality of life on patients with cardiovascular diseases.