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Table 4 Fit indices for the measurement invariance

From: German Beck Scale for Suicide Ideation (BSS): psychometric properties from a representative population survey

Model χ2 df CFI RMSEA [95% CI] ΔCFI ΔRMSEA
Group = gender
 Configural 40.915 11 0.997 0.047 [0.032, 0.063]
 Weak 48.435 15 0.997 0.043 [0.030, 0.056] < .001 0.004
 Strong 48.776 19 0.997 0.036 [0.024, 0.048] < .001 0.007
 Strict 50.061 23 0.998 0.031 [0.019, 0.043] 0.001 0.005
Group = age
 Configural 26.326 17 0.999 0.026 [0.000, 0.044]
 Weak 57.155 25 0.997 0.040 [0.026, 0.053] 0.002 0.014
 Strong 59.228 33 0.998 0.031 [0.018, 0.044] 0.001 0.009
 Strict 61.958 41 0.998 0.025 [0.010, 0.037] < .001 0.006
Group = depression status
 Configural 42.116 11 0.995 0.048 [0.033,0.064]
 Weak 44.812 15 0.996 0.040 [0.027, 0.054] 0.001 0.008
 Strong 53.68 19 0.995 0.039 [0.027, 0.051] 0.001 0.001
 Strict 62.533 23 0.994 0.037 [0.026, 0.049] 0.001 0.002
  1. Note. CFI Comparative Fit Index; All fit statistics are robust.; configural = (for identification purposes) loadings of one marker variable per factor fixed to 1, unique variances of marker variables fixed to 1; all thresholds equally constrained across groups, unique variance of first group fixed to 1, factor means of first group fixed to 0; weak/strong = additionally all free loadings constrained to equality across groups; strict = additionally all unique variances of all groups fixed to 1