Table 1. Confirmatory factor analysis fit indexes and model comparison for the BSI.

Model		S-Bχ2	df	CFI	TLI	RMSEA	RMSEA 90%CI
1	One factor	52166.585	1325	0.981	0.980	0.083	[0.082 - 0.083]
2	Nine correlated factors*	21190.698	1091	0.992	0.991	0.056	[0.055 - 0.056]
3	Hierarchical	30708.836	1316	0.989	0.988	0.063	[0.062 - 0.064]
4	Bifactor	25602.890	1276	0.991	0.990	0.057	[0.057 - 0.058]
5	Exploratory bifactor*	15822.885	1240	0.995	0.995	0.043	[0.042 - 0.044]
Model comparison		Δχ 2	Δdf
Model 4
Model 3		2848.7	40	p < 0.001
Model 1		12643.8	9	p < 0.001

* Latent variable covariance matrix not positive definite.

90%CI = 90% confidence interval; CFI = comparative fit index; df = degrees of freedom; RMSEA = root mean square error of approximation; S-B = Satorra-Bentler; TLI = Tucker-Lewis index.

Italic text indicates the best fitting model.

All models were statistically significant (p < 0.001).