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Table 4 Fit statistics for measurement equivalence/invariance of WHO-5 scores across gender groups

From: Assessing mental well-being in a Sinhala speaking Sri Lankan population: validation of the WHO-5 well-being index

     ∆χ2      
Model χ2 df p ∆χ2 ∆DF p CFI ∆CFI TLI RMSEA RAMSEA CI ∆RMSEA
1.Configural invariance 27.38 21 0.15 0.997 0.997 0.048 0.000–0.093
2.Metric invariance 35.35 25 0.08 9.78 4 0.04 0.995 0.002 0.996 0.056 0.000–0.095 0.008
3.Scalar invariance 45.30 34 0.09 13.00 9 0.06 0.994 0.003 0.997 0.050 0.000–0.085 0.002
4.Strict invariance 55.24 39 0.04 14.74 5 0.01 0.992 0.005 0.996 0.056 0.010–0.088 0.008