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Table 2 Comparison of model fit for baseline model

From: Evidence for measurement bias of the short form health survey based on sex and metropolitan influence zone in a secondary care population

 χ2 (df)p valueRMSEA [95% CI]CFITLI
Model 1: Ware et al. with correlated factors311.71 (53)<.001.107 [.095–.118]a.790a.739
Model 2: model 1 + cross-loading items 1, 10, 12198.31 (50)<.001.083 [.071–.096]a.880a.841
Model 3: model 2 + residual covariances for items from same SF-36 scale161.93 (46)<.001.077 [.064–.090]a.906a.865
Model 4: model 3 + cross-loading items 4, 5 and residual covariance for items 9, 1083.24 (43)<.001.047 [.031–.062].967.950
  1. Model 1: items 1,2,3,4,5,8 on physical health factor and items 6,7,9,10,11,12 on mental health factor
  2. All models estimated using WLSMV
  3. aPoor model fit indicated by RMSEA > .05 and CFI < .95