TY  - JOUR
U1  - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed)
A1  - Wirtz, Markus Antonius
A1  - Schulz, Anja Alexandra
A1  - Brähler, Elmar
T1  - Confirmatory and bi-factor analysis of the Short Form Health Survey 8 (SF-8) scale structure in a German general population sample
JF  - Health and Quality of Life Outcomes
N2  - Background
The SF-8 is a short form of the SF-36 Health Survey, which is used for generic assessment of physical and mental aspects of health-related quality of life (HRQoL). Each of the 8 dimensions of the SF-36 is covered by a single item in the SF-8. The aim of the study was to examine the latent model structure of the SF-8.    
        
Method
One-, two- and three dimensional as well as bi-factor structural models were defined and estimated adopting the ML- as well as the WLSMV-algorithm for ordinal data. The data were collected in a German general population sample (N = 2545 persons).        
        
Results
A two- (physical and mental health) and a three-dimensional CFA structure (in addition overall health) represent the empirical data information adequately [CFI = .987/.995; SRMR = .024/.014]. If a general factor is added, the resulting bi-factor models provide a further improvement in data fit [CFI = .999/.998; SRMR = .001]. The individual items are much more highly associated with the general HRQoL factor (loadings: .698 to .908) than with the factors physical, mental, and overall health (loadings: −.206 to .566).        
        
Conclusions
In the SF-8, each item reflects mainly general HRQoL (general factor) as well as one of the three components physical, mental, and overall health. The findings suggest in particular that the evaluation of the information of the SF-8 items can be validly supplemented by a general value HRQoL.
KW  - -
KW  - Short form Health Survey 8 (SF-8)
KW  - Health-related quality of life (HRQoL)
KW  - Construct validity
KW  - Confirmatory structural modelling
KW  - Bi-factor model
UN  - https://nbn-resolving.org/urn:nbn:de:bsz:frei129-opus4-19100
SN  - 1477-7525
SS  - 1477-7525
U6  - https://doi.org/10.1186/s12955-021-01699-8
DO  - https://doi.org/10.1186/s12955-021-01699-8
VL  - 19
IS  - 1
PB  - BioMed Central
ER  -