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Table 2 Model indices for confirmatory factor analyses, and measurement invariance across language, ethnicity and chronic conditions

From: Confirmatory factor analysis and measurement invariance of the English, Mandarin, and Malay versions of the SF-12v2 within a representative sample of the multi-ethnic Singapore population

  WLSMV χ2 (df) RMSEA CFI TLI SRMR DIFF TEST χ2 (df), p ΔRMSEAa ΔCFIa ΔTLI ΔSRMR
Confirmatory factor analyses           
Model 1
Unidimensional
3994.848 (54) 0.109 0.940 0.926 0.116
Model 2
Two–factor model
2304.272 (53) 0.083 0.965 0.957 0.082 554.73 (1), p < 0.001 − 0.026  + 0.025  + 0.031 − 0.034
Model 3
Two-factor model with correlated residuals
618.043 (48) 0.044 0.991 0.988 0.044 939.031 (5), p < 0.001 − 0.039 0.026  + 0.031 − 0.038
Confirmatory factor analyses by language subgroupsb
English language only           
Model 2
Two-factor model
3652.579 (53) 0.118 0.951 0.939 0.078
Model 3
Two-factor model with correlated residuals
1210.750 (48) 0.070 0.984 0.978 0.046 1422.088 (5), p < 0.001 − 0.048  + 0.033 +0.039 − 0.032
Mandarin language only           
Model 2
Two-factor model
543.064 (53) 0.129 0.962 0.953 0.097
Model 3
Two-factor model with correlated residuals
206.138 (48) 0.077 0.988 0.983 0.057 208.193 (5), p < 0.001 − 0.052  + 0.026  + 0.03 − 0.04
Malay language           
Model 2
Two-factor model
566.189 (53) 0.123 0.987 0.983 0.074
Model 3
Two-factor model with correlated residuals
310.606 (48) 0.092 0.993 0.991 0.052 169.298 (5), p < 0.001 − 0.025  + 0.006  + 0.008 − 0.022
Measurement invariance (MGCFA)           
Language           
Configural 895.138 (144) 0.051 0.991 0.988 0.046   
Metric 879.544 (164) 0.046 0.991 0.99 0.046 54.333 (20), p < 0.001 − 0.005 0   
Scalar 1178.003 (222) 0.046 0.988 0.99 0.05 378.713 (58), p < 0.001 0 − 0.003   
Ethnicity           
Configural 1473.219 (195) 0.065 0.991 0.988 0.048   
Metric 1354.748 (225) 0.057 0.992 0.991 0.048 33.096 (30), p = 0.32 − 0.008 +0.001   
Scalar 1398.609 (312)  0.048 0.992 0.993 0.049 231.257 (87) , p < 0.001 − 0.01 0   
Chronic physical conditions           
Configural 680.066 (97) 0.044 0.991 0.987 0.047   
Metric 654.824 (107) 0.041 0.991 0.989 0.048 39.467 (10), p < 0.001 − 0.003 0   
Scalar 666.124 (136) 0.036 0.991 0.992 0.053 87.085 (29), p < 0.001 − 0.005 0   
  1. aOnly change in RMSEA and CFI were evaluated for MGCFA
  2. bThe CFAs within the language subgroups were not weighted using survey weights