Table 6 Multiple-group confirmatory factor analysis and measurement invariance levels of the six-item Simplified Medication Adherence Questionnaire (SMAQ) for control and intervention groups at T1 and T2 among female HIV/AIDS clients in Ethiopia
| Ā | Configural | Weak factorial | Strong factorial | |||
|---|---|---|---|---|---|---|
Factor Loadings | Factor Loadings | Factor Loadings | ||||
Estimate | p-value | Estimate | p-value | Estimate | p-value | |
Control group at T1 | ||||||
āDo you ever forget to take your medicine? | 1.00 | ā | 1.00 | ā | 1.00 | ā |
āAre you careless at times about taking your medicine? | 0.26 | 0.05 | 0.26 | 0.00 | 0.26 | 0.00 |
āSometimes if you feel worse, do you stop taking your medicines? | 0.48 | 0.03 | 0.33 | 0.00 | 0.33 | 0.00 |
āThinking about the last week. How often have you not taken your medicine? | 1.00 | 0.02 | 0.97 | 0.00 | 0.93 | 0.00 |
āDid you not take any of your medicine over the past weekend? | 0.85 | 0.03 | 0.63 | 0.00 | 0.60 | 0.00 |
āOver the past 3āmonths, how many days have you not taken any medicine at all? | 1.15 | 0.02 | 1.12 | 0.00 | 1.18 | 0.00 |
Intervention group at T1 | ||||||
āDo you ever forget to take your medicine? | 1.00 | ā | 1.00 | ā | 1.00 | ā |
āAre you careless at times about taking your medicine? | 0.29 | 0.01 | 0.26 | 0.00 | 0.26 | 0.00 |
āSometimes if you feel worse, do you stop taking your medicines? | 0.33 | 0.01 | 0.33 | 0.00 | 0.33 | 0.00 |
āThinking about the last week. How often have you not taken your medicine? | 2.95 | 0.27 | 0.97 | 0.00 | 0.93 | 0.00 |
āDid you not take any of your medicine over the past weekend? | 1.34 | 0.00 | 0.63 | 0.00 | 0.60 | 0.00 |
āOver the past 3āmonths, how many days have you not taken any medicine at all? | 0.92 | 0.00 | 1.12 | 0.00 | 1.18 | 0.00 |
Control group at T2 | ||||||
āDo you ever forget to take your medicine? | 1.00 | ā | 1.00 | ā | 1.00 | ā |
āAre you careless at times about taking your medicine? | 0.40 | 0.02 | 0.26 | 0.00 | 0.26 | 0.00 |
āSometimes if you feel worse, do you stop taking your medicines? | 0.41 | 0.02 | 0.33 | 0.00 | 0.33 | 0.00 |
āThinking about the last week. How often have you not taken your medicine? | 1.00 | 0.01 | 0.97 | 0.00 | 0.93 | 0.00 |
āDid you not take any of your medicine over the past weekend? | 0.36 | 0.03 | 0.63 | 0.00 | 0.60 | 0.00 |
āOver the past 3āmonths, how many days have you not taken any medicine at all? | 1.31 | 0.09 | 1.12 | 0.00 | 1.18 | 0.00 |
Intervention group at T2 | ||||||
āDo you ever forget to take your medicine? | 1.00 | ā | 1.00 | ā | 1.00 | ā |
āAre you careless at times about taking your medicine? | 0.21 | 0.03 | 0.26 | 0.00 | 0.26 | 0.00 |
āSometimes if you feel worse, do you stop taking your medicines? | 0.30 | 0.03 | 0.33 | 0.00 | 0.33 | 0.00 |
āThinking about the last week. How often have you not taken your medicine? | 0.58 | 0.03 | 0.97 | 0.00 | 0.93 | 0.00 |
āDid you not take any of your medicine over the past weekend? | 0.26 | 0.05 | 0.63 | 0.00 | 0.60 | 0.00 |
āOver the past 3āmonths, how many days have you not taken any medicine at all? | 2.64 | 0.64 | 1.12 | 0.00 | 1.18 | 0.00 |