Table 1.
Cox Regression Predicting Mortality in 20 Years from Date of First Interview by Homebound Status
| Impact after controlling for survey stratification variables | Impact after controlling for background, health and function variables | |||
|---|---|---|---|---|
| Exp(b) | CI | Exp(b) | CI | |
| Background | ||||
| Age | 1.07*** | 1.05-1.08 | 1.05*** | 1.04-1.07 |
| Gender (female=0, male=1) | 1.32*** | 1.17-1.50 | 1.58*** | 1.33-1.88 |
| Origin (east) | .88 | .76-1.02 | .77** | .64-.93 |
| Origin (west) | 1.15 | .99-1.33 | 1.06 | .91-1.02 |
| Years of education | 1.00 | .99-1.02 | ||
| Additional income | .87* | .75-1.00 | ||
| Marital status | .92 | .79-1.08 | ||
| Had children | .65** | .52-.84 | ||
| Health | ||||
| Comorbidity | 1.03 | .99-1.06 | ||
| Function | ||||
| ADL | 1.07** | 1.03-1.11 | ||
| IADL | 1.03** | 1.01-1.04 | ||
| Cognitive difficulties | 1.01 | .99-1.02 | ||
| Environment | ||||
| Having stairs and no elevator | 0.93 | .80-1.08 | ||
| Mental health | ||||
| Depressive affect | .97 | .81-1.18 | ||
| Distal events | ||||
| Traumatic events | .98 | .90-1.06 | ||
| χ2 of step | χ2= 152.52*** | χ2= 78.20*** | ||
| -2 log likelihood | 13970.32 | 10811.55 | ||
| Homebound (vs. non-homebound) | 1.68*** | 1.44-1.97 | 1.33** | 1.08-1.63 |
| χ2 of step | χ2 = 39.80*** | χ2= 7.16** | ||
| -2 log likelihood | 13930.53 | 10804.195 | ||
*
p < .05,
**
p < .01,
***
p < .001.