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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