Table 5 Model fit indices and measurement invariance test for the six-item Simplified Medication Adherence Questionnaire (SMAQ) among female HIV/AIDS clients in Ethiopia
Model fit indices | Configural invariance model | Weak factorial invariance model | Strong invariance model | |||
|---|---|---|---|---|---|---|
Estimate | p-value | Estimate | p-value | Estimate | p-value | |
Chi-square (degree of freedom) | 76.28 (36) | 0.00 | 106.85 (51) | 0.00 | 122.82 (66) | 0.00 |
Root mean square error of approximation (RMSEA) (90% Confidence interval) | 0.07 (0.05ā0.09) | 0.07 | 0.07 (0.05ā0.09) | 0.04 | 0.06 (0.04ā0.08) | 0.13 |
Comparative Fit Index (CFI) | 0.99 | Ā | 0.99 | Ā | 0.99 | Ā |
Tucker Lewis Index (TLI) | 0.98 | Ā | 0.98 | Ā | 0.99 | Ā |
Chi-square difference (degrees of freedom) | ā | Ā | 34.79 (15) | 0.00 | 13.36 (15) | 0.57 |