Table 3.
Hurdle Regression
| Service used |
Times used service |
|||||||
|---|---|---|---|---|---|---|---|---|
| Variable | OR | |z| | p > |z| | 95% CI | IRR | |z| | p > |z| | 95% CI |
| Patient gender (female) | 0.74 | 1.64 | 0.101 | 0.51, 1.06 | 1.39 | 2.02 | 0.043 | 1.01, 1.90 |
| Caregiver group (spouse as base) | ||||||||
| Other family relative | 1.31 | 1.09 | 0.275 | 0.80, 2.15 | 0.99 | 0.03 | 0.980 | 0.47, 2.08 |
| Other caregiver | 0.54 | 0.85 | 0.395 | 0.13, 2.25 | 0.28 | 94.01 | <0.001 | 0.27, 0.28 |
| Age of patient (current) | 1.00 | 0.17 | 0.865 | 0.96, 1.05 | 0.99 | 7.58 | <0.001 | 0.99, 0.99 |
| Age of patient at symptom onset | 0.98 | 0.53 | 0.596 | 0.92, 1.05 | 1.04 | 2.87 | 0.004 | 1.01, 1.06 |
| Education (years) | 1.06 | 2.39 | 0.017 | 1.01, 1.12 | 1.08 | 10.79 | <0.001 | 1.07, 1.10 |
| MMSE total score | 0.95 | 2.93 | 0.003 | 0.92, 0.98 | 0.99 | 0.16 | 0.873 | 0.93, 1.07 |
| BRDRS total score | 1.06 | 2.97 | 0.003 | 1.02, 1.11 | 1.11 | 0.82 | 0.415 | 0.87, 1.42 |
| Number of medications | 1.02 | 3.22 | 0.001 | 1.01, 1.04 | 1.04 | 0.86 | 0.388 | 0.95, 1.14 |
| Number of co-morbid illnesses | 1.14 | 2.65 | 0.008 | 1.03, 1.26 | 1.19 | 0.99 | 0.320 | 0.84, 1.68 |
OR, odds ratio; IRR, incident rate ratio; MMSE, Mini-Mental State Examination; BRDRS, Blessed Roth Dementia Rating Scale. Cluster-robust standard errors for study site were implemented.