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Table 5 Fit indices of the first- and second-order confirmatory factor analysis of the E-RAS

From: Design and psychometric evaluation of epilepsy-related apathy scale (E-RAS) in adults with epilepsy: a sequential exploratory mixed methods design

CFA χ2 df P-value CMIN/df RMSEA PCFI PNFI AGFI IFI CFI
First-order after structure modification 577.195 241 < 0.001 2.39 0.075 0.64 0.68 0.70 0.92 0.91
Second-order after structure modification 480.868 239 < 0.001 2.01 0.062 0.72 0.83 0.88 0.95 0.96
  1. Abbreviations: E-RAS epilepsy– related apathy scale, CFA confirmatory factor analysis, CMIN/DF Chi-square/degree-of-freedom ratio, RMSEA Root Mean Square Error of Approximation, PCFI Parsimonious Comparative Fit Index, PNFI Parsimonious Normed Fit Index, AGFI Adjusted Goodness-of-Fit Index, IFI Incremental Fit Index, CFI Comparative Fit Index
  2. Fit indices: PNFI, PCFI, AGFI (> 0.5), CFI, IFI (> 0.9), RMSEA (> 0.08), CMIN/DF (> 3 good, > 5 acceptable)