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Table 4 Analysis of measurement invariance of the BSI-18 three-factorial model between groups of age and gender

From: Norm values and psychometric properties of the brief symptom inventory-18 regarding individuals between the ages of 60 and 95

Model χ2(df) Δχ2 p CFI ΔCFI GH ΔGH
Gender Multi-group Analysis (Female/Male)
 Configural invariance 628.82 (264)    .900   .916  
 Female 295.711 (132)    .916   .963  
 Male 335.521 (132)    .881   .945  
 Metric invariance 647.59 (281) 18.77 .342 .899 .001 .917 .001
 Scalar invariance 689.77 (295) 42.18 < .001 .891 .008 .910 .007
 Strict invariance 711.41 (313) 21.64 .248 .890 .001 .908 .002
Age Multi-group Analysis (60–64, 65–69, 70–74, ≤ 75)
 Configural invariance 1069.61 (528)    .870   .936  
 60–64 291.785 (132)    .916   .953  
 65–69 285.490 (132)    .856   .933  
 70–74 276.288 (132)    .830   .931  
 ≤ 75 216.042 (132)    .872   .931  
 Metric invariance 1123.38 (579) 53.77 .369 .869 .001 .936 .000
 Scalar invariance 1208.76 (621) 85.38 < .001 .859 .010 .931 .005
 Strict invariance 1268.30 (675) 59.54 .281 .857 .002 .931 .000
  1. CFI Comparative Fit Index, GH Gamma hat