Table 1.
Comparison of risks of outcomes of interest between the vaccinated and unvaccinated cohorts.
| Variables | Total | Without IV | With IV | With IV vs. without IV (Ref.) | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (N = 272,896) | (N = 136,448) | (N = 136,448) | cOR | 95% CI | p-Value | aOR# | 95% CI | p-Value | ||||||
| Event | Incident (‰) | Event | Incident (‰) | Event | Incident (‰) | |||||||||
| Death | 24,368 | 89.29 | 13 918 | 102.00 | 10,450 | 76.59 | 0.72 | 0.70 | 0.74 | <0.001 | 0.70 | 0.68 | 0.72 | <0.001 |
| Hospitalization | ||||||||||||||
| Influenza and pneumonia | 29,556 | 108.30 | 14,296 | 104.77 | 15,260 | 111.84 | 1.08 | 1.05 | 1.11 | <0.001 | 0.98 | 0.95 | 1.01 | 0.111 |
| Respiratory diseases | 41,131 | 150.72 | 20,228 | 148.25 | 20,903 | 153.19 | 1.04 | 1.02 | 1.06 | <0.001 | 0.96 | 0.94 | 0.99 | 0.004 |
| Respiratory failure | 12,636 | 46.30 | 6589 | 48.29 | 6047 | 44.32 | 0.91 | 0.88 | 0.95 | <0.001 | 0.85 | 0.82 | 0.89 | <0.001 |
| Heart disease | 24,589 | 90.10 | 12,422 | 91.04 | 12,167 | 89.17 | 0.98 | 0.95 | 1.00 | 0.085 | 0.96 | 0.93 | 0.99 | 0.004 |
| Hemorrhagic stroke | 1103 | 4.04 | 605 | 4.43 | 498 | 3.65 | 0.82 | 0.73 | 0.93 | 0.001 | 0.85 | 0.75 | 0.97 | 0.014 |
| Ischemic stroke | 4249 | 15.57 | 2291 | 16.79 | 1958 | 14.35 | 0.85 | 0.80 | 0.91 | <0.001 | 0.89 | 0.84 | 0.95 | 0.001 |
| Any one of above disease | 53,622 | 196.49 | 26,631 | 195.17 | 26,991 | 197.81 | 1.02 | 1.00 | 1.04 | 0.075 | 0.96 | 0.94 | 0.98 | <0.001 |
Abbreviations: IV, Influenza vaccination; ref., reference group; cOR, crude odds ratio; aOR, adjusted odds ratio; CI, confidence interval # All models were analyzed via the generalized estimating equation. Extraneous factors adjusted in the model contained disability severity, type of disability, age, sex, premium salary, urbanization level, CCI score, catastrophic illness status, long-term care facility residents, outpatient utilization, hospital admission, and preventive care service utilization.