Table 2.
Association of NPI-12 total and NPI subdomains with informal costs of dementia care since dementia onset [Cost = β0 + β1time (dementia duration) + β2NPI-SD + ε]
| Model/Variable | exp β | 95% CI | P Value |
|---|---|---|---|
| Model 1 NPI-12 Total | |||
| Intercept | 12.794 | 8.058–20.315 | <.001 |
| Time (y) | 1.184 | 1.100–1.275 | <.001 |
| NPI Total | 1.026 | 1.013–1.039 | <.001 |
| Model 2 NPI Apathy Subdomain | |||
| Intercept | 14.524 | 9.883–21.342 | <.001 |
| Time (y) | 1.217 | 1.136–1.304 | <.001 |
| Apathy | 1.040 | 0.998–1.083 | .063 |
| Model 3 NPI Agitation–Aggression Subdomain | |||
| Intercept | 16.153 | 11.181–23.338 | <.001 |
| Time (y) | 1.191 | 1.115–1.273 | <.001 |
| Agitation–Aggression | 1.095 | 1.038–1.156 | <.001 |
| Model 4 NPI Sleep Subdomain | |||
| Intercept | 15.670 | 10.789–22.758 | <.001 |
| Time (y) | 1.220 | 1.140–1.305 | <.001 |
| Sleep | 1.015 | 0.973–1.058 | .494 |
| Model 5 NPI Appetite Subdomain | |||
| Intercept | 16.234 | 11.154–23.629 | <.001 |
| Time (y) | 1.218 | 1.138–1.302 | <.001 |
| Appetite | 0.999 | 0.954–1.045 | .958 |
| Model 6 NPI Affective Subdomain | |||
| Intercept | 12.639 | 8.209–19.459 | <.001 |
| Time (y) | 1.216 | 1.130–1.308 | <.001 |
| Affective | 1.072 | 1.039–1.106 | <.001 |
| Model 7 NPI Psychosis Subdomain∗ | |||
∗
Model did not converge.