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

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

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

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

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