Cross-cultural adaptation and psychometric properties of the Italian version of the Orthorexia Nervosa Inventory (ONI)

Table 5 Tests of measurement invariance of the ONI across gender

Model	χ² (df)	CFI	TLI	RMSEA (90% CI)	SRMR	Model comparison	ΔCFI	ΔTLI	ΔRMSEA
1. Configural invariance	704.796 (414)	0.979	0.972	0.041 (0.036–0.047)	0.045
2. Metric invariance	745.588 (477)	0.981	0.977	0.037 (0.032–0.042)	0.051	2 vs. 1	0.002	0.005	-0.004
3. Scalar invariance	772.060 (522)	0.982	0.981	0.034 (0.029–0.039)	0.053	3 vs. 2	0.001	0.004	-0.003

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