| |
ZIP model |
Hurdle model |
| Parameter |
Estimate |
Std error |
p-value |
Estimate |
Std error |
p-value |
| The zero component |
| Sex |
-0.22 |
0.12 |
0.06 |
-0.15 |
0.10 |
0.16 |
| Years of education |
0.02 |
0.02 |
0.21 |
0.02 |
0.10 |
0.25 |
| Marital status |
-0.06 |
0.12 |
0.60 |
-0.01 |
0.10 |
0.93 |
| Household income |
-0.07 |
0.05 |
0.10 |
-0.07 |
0.04 |
0.08 |
| Smoking |
0.02 |
0.17 |
0.89 |
-0.05 |
0.15 |
0.75 |
| Drug |
0.11 |
0.12 |
0.35 |
0.13 |
0.10 |
0.20 |
| MMSE |
0.004 |
0.01 |
0.73 |
0.01 |
0.01 |
0.36 |
 |
3.75 |
0.55 |
<0.0001 |
3.29 |
0.43 |
<0.0001 |
| The Poisson component |
| Sex |
-0.05 |
0.04 |
0.68 |
-0.02 |
0.04 |
0.67 |
| Years of education |
-0.002 |
0.01 |
0.69 |
-0.002 |
0.01 |
0.63 |
| Marital status |
-0.05 |
0.04 |
0.20 |
-0.05 |
0.04 |
0.22 |
| Household income |
0.01 |
0.01 |
0.41 |
0.01 |
0.01 |
0.51 |
| Smoking |
0.12 |
0.05 |
0.03 |
0.10 |
0.05 |
0.05 |
| Drug |
-0.02 |
0.04 |
0.52 |
-0.02 |
0.03 |
0.51 |
| MMSE |
0.002 |
0.004 |
0.64 |
0.001 |
0.004 |
0.67 |
|
0.44 |
0.04 |
<0.0001 |
0.44 |
0.04 |
<0.0001 |
 |
-0.88 |
0.07 |
<0.0001 |
-1.08 |
0.06 |
<0.0001 |
| Fit Statistics |
|
|
|
|
|
|
| AIC |
31490 |
|
|
31481 |
|
|
| BIC |
31640 |
|
|
31637 |
|
|
*AIC=32235, BIC=32324 from standard Poisson regression model |
