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Table 3 Test of measurement invariance across sex and age

From: Psychometric properties and validation of the English version Giessen Subjective Complaints List (GBB-8)

  χ2 df Δχ2 Δdf p CFI ΔCFI RMSEA ΔRMSEA
Participant sex (male, female)          
 Configural model 81.981 32     .985   .072  
 1st order weak invariance 89.422 36 7.441 4 .114 .985 0 .069 .003
 2nd order weak invariance 93.273 39 3.851 3 .278 .985 0 .066 .003
 1st order strong invariance 99.694 43 6.421 4 .17 .985 0 .063 .003
 2nd order strong invariance 107.529 46 7.835 3 .05 .984 .001 .063 0
 1st order strict invariance 117.238 54 9.709 8 .286 .984 0 .059 .004
 2nd order strict invariance 126.662 58 9.424 4 .051 .982 .002 .06 − .001
 Mean equivalence 128.558 59 1.896 1 .169 .982 0 .06 0
Age groups (< 30, 30–39, 40–49, > 49)          
Configural model 108.741 64     .987   .068  
 1st order weak invariance 124.371 76 15.63 12 .209 .987 0 .062 .006
 2nd order weak invariance 135.123 85 10.752 9 .293 .987 0 .059 .003
 1st order strong invariance 145.451 97 10.328 12 .587 .988 − .001 .053 .006
 2nd order strong invariance 153.651 106 8.2 9 .514 .988 0 .05 .003
 1st order strict invariance 194.985 130 41.334 24 .015 .984 .004 .053 − .003
 2nd order strict invariance 202.323 142 7.338 12 .834 .984 0 .05 .003
 Mean equivalence 213.344 145 11.021 3 .012 .982 .002 .052 − .002
  1. χ2, chi square; df, degrees of freedom; Δ, change from previous model; p, significance level; CFI, Comparative Fit Index; RMSEA, root mean square error of approximation