Table 3.
Mortality hazard ratios for frailty, socioeconomic vulnerability, and interactions based on including those lost to follow-up, CLHLS 2008/2009-2011/2012
| Model I | Model II | Model III | Model IV | Model V | Model VI | Model VII | Model VIII | |
|---|---|---|---|---|---|---|---|---|
| Main terms | ||||||||
| Frailty index (×100) | 1.029*** | 1.043*** | 1.041*** | 1.037*** | 1.112*** | 1.110*** | 1.105*** | 1.104*** |
| SEVI (×100) | 1.006*** | 1.013*** | 1.011** | 1.049** | 1.010*** | 1.009*** | 1.040*** | 1.036*** |
| Interaction terms | ||||||||
| SEVI*frailty index (×100) | 0.980*** | 0.982*** | 0.989** | 0.986*** | 0.988** | 0.992* | 0.993+ | |
| SEVI*age | 0.960*** | 0.967*** | 0.969*** | |||||
| Frailty index*age | 0.930*** | 0.930*** | 0.932*** | 0.932*** | ||||
| Controls | ||||||||
| Age | 1.059*** | 1.058*** | 1.054*** | 1.087*** | 1.078*** | 1.074*** | 1.102*** | 1.096*** |
| Men (women) | 1.493*** | 1.494 *** | 1.548*** | 1.483*** | 1.478*** | 1.522*** | 1.469*** | 1.510*** |
| Han ethnicity (non-Han) | 0.844*** | 0.847*** | 0.867** | 0.842*** | 0.851** | 0.871** | 0.848** | 0.867** |
| Coresidence with family (no) | 1.106** | 1.112** | 1.132** | |||||
| Currently married (no) | 0.772*** | 0.788*** | 0.797*** | |||||
| Currently smoking (no) | 1.043 | 1.064 | 1.068+ | |||||
| Doing regular exercise (no) | 0.872*** | 0.866*** | 0.868*** | |||||
| N | 16,563 | 16,563 | 16,563 | 16,563 | 16,563 | 16,563 | 16,563 | 16,563 |
| Wald Chi square | 5544.1*** | 5570.0*** | 5525.4*** | 5401.5*** | 4986.1*** | 4947.5*** | 4853.2*** | 4843.6*** |
Relative hazards were estimated based on inclusion of those lost to follow-up whose survival status and days survived from the interview in 2008 to the interview in 2011 were imputed. The imputation assumed that those who were lost to follow-up had the same survival status and survival length with those who were not lost to follow up given the same demographics, frailty index score, SEVI score, family/social support and health practice
Score of frailty index ranges from 0 (no deficits, the healthiest) to 1 (all deficits, the worst), while the score of the socioeconomic vulnerability index ranges from 0 (the least vulnerable) to 1 (the most vulnerable)
The reference category for each control is in parentheses
A model that includes the interaction between SEVI and age, main terms, and controls is similar to Model IV. A model that includes the interaction between frailty index and age, main terms and controls is similar to Model V. Therefore, these two models are not presented to save the space
+p <0.1, *p <0.05, ** p <0.01, *** p <0.001