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

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

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