Table 2.
Score-difference between the language versions of MM-CGI subscales and MM-CGI-SF subscales
| Subscales of MM-CGI and MM-CGI-SF | Mean scores (SD) | Equivalence margin (5%)a | Equivalence margin (10%)b | Difference between Chinese and English version (90% CI) | ||
|---|---|---|---|---|---|---|
| Chinese | English | Unadjusted | Adjustedc | |||
| MM-CGI | ||||||
| Personal Sacrifice Burden subscale | 54.8 (12.9) | 53.3 (14.5) | ±3 | ±6 | 1.5 (−1.2 to 4.2) | 1.0 (−1.8 to 3.8) |
| Heartfelt Sadness and Longing subscale | 44.0 (8.8) | 43.3 (11.9) | ±2 | ±4 | 0.8 (− 1.4 to 2.9) | −0.5 (−2.7 to 1.8) |
| Worry and Felt Isolation subscale | 45.3 (8.9) | 43.9 (11.4) | ±2 | ±4 | 1.4 (−0.6 to 3.5) | 0.7 (−1.5 to 2.9) |
| MM-CGI-SF | ||||||
| Personal Sacrifice Burden subscale | 18.7 (4.7) | 18.2 (5.3) | ±1 | ±2 | 0.4 (−0.5 to 1.4) | 0.3 (− 0.7 to 1.4) |
| Heartfelt Sadness and Longing subscale | 17.5 (3.6) | 17.7 (4.8) | ±1 | ±2 | −0.2 (−1.1 to 0.6) | − 0.6 (− 1.5 to 0.3) |
| Worry and Felt Isolation subscale | 15.7 (4.0) | 15.6 (4.9) | ±1 | ±2 | 0.2 (−0.7 to 1.1) | −0.2 (−1.1 to 0.8) |
MM-CGI, Marwit-Meuser Caregiver Grief Inventory; MM-CGI-SF, Marwit-Meuser Caregiver Grief Inventory-Short Form; SD, standard deviation; CI, confidence interval
aThe pre-defined margins of equivalence represented approximately 5% of the reported average subscale scores from the original publications [16, 17]
bThe pre-defined margins of equivalence represented approximately 10% of the reported average subscale scores from the original publications [16, 17]
cThe adjusted models accounted for relationship with PWD, stage of dementia, and baseline variables which were significantly different between the two languages (caregiver’s age, ethnicity, education and role as primary caregiver)