Validation of the factor structure and psychometric characteristics of the Arabic adaptation of the sense of coherence SOC-13 scale: a confirmatory factor analysis

Table 8 Measurement invariance analysis for different age categories based on the theoretical three-factor model

Factor	χ² (df)	Δ χ² (Δdf)	Δ χ² P	CFI	Δ CFI	RMSEA	ΔRMSEA
Base: 18-to-25	709 (62)			0.901		0.127
Base: 26-to-33	225 (62)			0.959		0.107
Base: 34-to-41	185 (62)			0.967		0.116
Base: 42-to-49	181 (62)			0.953		0.127
Configural invariance: age	1557 (372)	868 (310)	< 0.0001	0.942		0.125
Metric invariance: age	2051 (422)	494 (50)	< 0.0001	0.920	0.022	0.137	0.012