Table 2. Correlation matrix of patient and caregiver variables.
| Variables | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. Patient age | 1 | |||||||||||||
| 2. Patient sex | 0.045 | 1 | ||||||||||||
| 3. K-MMSE | −0.058 | −0.099 | 1 | |||||||||||
| 4. CDR-SB | 0.047 | −0.036 | −0.707 | 1 | ||||||||||
| 5. BADL | −0.135 | −0.025 | 0.548 | −0.674 | 1 | |||||||||
| 6. S-IADL | 0.063 | −0.021 | −0.559 | 0.800 | −0.633 | 1 | ||||||||
| 7. CGA-NPI | −0.035 | 0.000 | −0.305 | 0.481 | −0.377 | 0.478 | 1 | |||||||
| 8. Caregiver age | 0.053 | −0.113 | 0.015 | 0.115 | −0.135 | 0.162 | 0.079 | 1 | ||||||
| 9. Caregiver sex | 0.083 | −0.085 | 0.016 | 0.027 | −0.015 | −0.029 | 0.075 | −0.184 | 1 | |||||
| 10. ZBI | −0.123 | −0.071 | −0.258 | 0.407 | −0.371 | 0.389 | 0.432 | 0.133 | 0.115 | 1 | ||||
| 11. CAS-K | −0.208 | −0.075 | −0.176 | 0.204 | −0.127 | 0.251 | 0.235 | 0.053 | 0.030 | 0.338 | 1 | |||
| 12. BDI | −0.113 | −0.092 | −0.171 | 0.221 | −0.331 | 0.242 | 0.352 | 0.077 | 0.131 | 0.553 | 0.252 | 1 | ||
| 13. Physical HRQoL | −0.038 | 0.081 | 0.039 | −0.159 | 0.268 | −0.220 | −0.171 | −0.360 | −0.103 | −0.357 | −0.163 | −0.435 | 1 | |
| 14. Mental HRQoL | 0.153 | 0.096 | 0.175 | −0.211 | 0.287 | −0.213 | −0.280 | −0.009 | −0.150 | −0.643 | −0.343 | −0.695 | 0.361 | 1 |
K-MMSE: Korean version of the Mini-Mental State Examination, CDR-SB: Clinical Dementia Rating Sum of Boxes, BADL: Barthel Activity of Daily Living, S-IADL: Seoul Instrumental Activities of Daily Living, CGA-NPI: Caregiver Administered Neuropsychiatric Inventory, ZBI: Zarit Burden Interview, CAS-K: Korean version of the Caregiver Activity Survey, BDI: Beck Depression Inventory, HRQoL: health-related quality of life.