Validity of a Revised Short Form-12 Health Survey Version 2 in Different Ethnic Populations.
- Author:
Maudrene Ls TAN
1
;
Hwee Lin WEE
;
Agus SALIM
;
Jeannette LEE
;
Stefan MA
;
Derrick HENG
;
E Shyong TAI
;
Julian THUMBOO
Author Information
- Publication Type:Journal Article
- MeSH: Asian Continental Ancestry Group; Chronic Disease; Ethnic Groups; Health Status; Health Surveys; Humans; Quality of Life; Reproducibility of Results; Singapore
- From:Annals of the Academy of Medicine, Singapore 2016;45(6):228-236
- CountrySingapore
- Language:English
-
Abstract:
INTRODUCTIONThe Short Form-12 version 2 (SF-12v2) is a shorter version of the Short Form-36 version 2 (SF-36v2) for assessing health-related quality of life. As the SF-12v2 could not be resolved into the physical- and mental-component summary score (PCS and MCS, respectively) in the general population of Singapore, this study aims to determine and validate the Singapore SF-12 version 2 (SG-12v2).
MATERIALS AND METHODSThe SG- 12v2 was generated using the same methodology as the SF-12v2. Bootstrap analysis was used to determine if the SG-12v2 were significantly different from the SF-12v2. Content validity was assessed using percentage of variance (R²) of the Singapore version of SF-36v2 PCS and MCS explained by the SG-12v2 items. Agreement between the SF-36v2 and the SG-12v2 was assessed using Bland-Altman diagrams. Criterion validity was demonstrated if effect size differences between SF-36v2 and SG-12v2 were small (Cohen's criteria). Known-group validity of SG-12v2 was reported for participants with and without chronic diseases.
RESULTSFive items differed between the SG-12v2 and SF-12v2. Bootstrap analysis confirmed that SG-12v2 and SF-12v2 were significantly different. The SG12v2 explained 94% and 79% of the R² of the SF-36v2 PCS and MCS, respectively. Agreement was good and effect size differences were small (<0.3). Participants with chronic diseases reported lower SG-12v2 scores compared to participants without chronic diseases.
CONCLUSIONThe SG-12v2 offers advantage over the SF-12v2 for use in the general population of Singapore. The SG-12v2 is a valid measure and will be particularly useful for large population health surveys in Singapore.