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Revista médica de Chile · Nov 2020
[Reliability and construct validity of SF-12 to measure health related quality of life in Chilean subjects].
- María Pía Martínez and Ismael Gallardo.
- Universidad de Talca, Talca, Chile.
- Rev Med Chil. 2020 Nov 1; 148 (11): 1568-1576.
BackgroundHealth-Related Quality of Life (HRQoL) is understood as a multidimensional variable, mostly measured using the SF-12 questionnaire. However, this measurement doesn't always replicate the factorial structure theoretically expected, hindering potential conclusions.AimTo assess the reliability and validity of SF-12 questionnaire in a representative sample of Chilean participants.Material And MethodsInformation was obtained from the National Quality of Life Survey performed in Chile during 2015-16. During the survey, SF-12 was answered by 7041 participants older than 15 years, with a median age of 47 years (63% women).ResultsSF-12 has reliability, but it does not have construct validity. The analysis suggests that there is a factorial structure that resembles theory, only when factors and items are related.ConclusionsThe practical importance of these results highlight the need to measure HRQoL using more extensive scales.
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