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Table 3 Results of CFA regarding scale structure of the BSI-18 (N = 884)

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

Model χ2(df) CMIN/DF CFI TLI RMSEA [90% CI] SRMR
1-Factor-Model 664.77 (135) * 4.78 .838 .817 .067 [.063; .070] .067
2-Factor-Model (DEPR + ANX/ SOMA) 471.21 (134) * 3.52 .897 .883 .053 [.050; .057] .054
3-Factor-Model (SOMA/ DEPR/ ANX) 401.86 (132) * 3.04 .918 .905 .048 [.045; .052] .053
GSI-Factor 1. Order und 2-Factor-Model 2. Order (DEPR + ANX/ SOMA) 467.69 (133) * 3.52 .898 .883 .053 [.050; .057] .054
GSI-Factor 1. Order und 3-Factor-Model 2. Order (SOMA/ DEPR/ ANX) 401.86 (132) * 3.04 .918 .905 .048 [.045; .052] .053
  1. Note. χ2 is Yuan-Bentler-scaled; * = p < .001, CFI Comparative Fit Index, TLI Tucker Lewis Index, RMSEA Root Mean Square Error of Approximation, SRMR Standarized Root Mean Square Residual