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Table 4 Results of the sequential process of assessing measurement invariance of the EPIC-26

From: Validation of the Italian version of the abbreviated expanded prostate Cancer index composite (EPIC-26) in men with prostate Cancer

Model SB Χ2 df p RMSEA CFI TLI SRMR ΔCFI
Configural Invariance 1892.249 1105 .000 .044 .913 .904 .062
Metric Invariance 2003.830 1125 .000 .047 .903 .895 .068 - .010
Scalar Invariance 2279.990 1145 .000 .052 .875 .866 .071 - .028
Partial Scalar Invariance - Item 14 2225.603 1144 .000 .051 .881 .872 .071 - .022
Partial Scalar Invariance – Item 5 2196.445 1143 .000 .051 .884 .876 .070 - .019
Partial Scalar Invariance – Item 25 2155.922 1142 .000 .050 .888 .880 .070 - .015
Partial Scalar Invariance – Item 6 2126.187 1141 .000 .049 .891 .883 .069 - .012
Partial Scalar Invariance – Item 21 2101.490 1140 .000 .048 .894 .886 .069 - .009
Residual Variance Invariance 2232.515 1160 .000 .051 .882 .875 .078 - .012
Partial Residual Variance Invariance – Item 13 2219.857 1159 .000 .050 .883 .876 .075 - .011
Partial Residual Variance Invariance – Item 22 2167.399 1158 .000 .049 .889 .882 .072 - .005
Factor Variance Invariance 2191.584 1163 .000 .050 .887 .881 .077 - .002
Factor Covariance Invariance 2231.046 1173 .000 .050 .883 .878 .078 - .004
Factor Mean Invariance 2562.749 1178 .000 .057 .847 .841 .098 - .036
Partial Factor Mean Invariance – Urinary Incontinence 2383.217 1177 .000 .053 .867 .862 .081 - .016
Partial Factor Mean Invariance – Urinary Irritation 2291.617 1176 .000 .051 .877 .872 .078 - .006
  1. The best fitting model for each of the seven steps of measurement invariance assessment is indicated in bold
  2. Note: SB Satorra-Bentler Chi Square, df degree of freedom, RMSEA Root mean square error of approximation, CFI Comparative fit index, TLI Tucker-Lewis index (TLI), SRMR Standardized root mean square residual, ΔCFI Difference in CFI between models