Table 2.
IRRs and 95% CIs of associations between non-receipt of vaccinations and IADL, IA, SR, or TMIG-IC.
| Number of incapable tasks/activities | Influenza vaccination | Pneumococcal vaccination | Neither of the two vaccinations | |
|---|---|---|---|---|
| 0 | 1.00 (Reference) | 1.00 (Reference) | 1.00 (Reference) | |
| IADL | 1* | 0.93 (0.87–0.99) | 1.04 (0.98–1.10) | 0.97 (0.89–1.07) |
| 2** | 1.04 (0.95–1.14) | 1.13 (1.05–1.23) | 1.17 (1.03–1.33) | |
| IA | 1 | 1.05 (1.02–1.09) | 1.02 (0.99–1.06) | 1.07 (1.02–1.13) |
| 2 | 1.04 (0.99–1.09) | 1.10 (1.08–1.12) | 1.18 (1.11–1.25) | |
| SR | 1 | 1.08 (1.04–1.12) | 0.99 (0.96–1.03) | 1.06 (1.01–1.12) |
| 2 | 1.12 (1.08–1.16) | 1.02 (0.98–1.06) | 1.13 (1.07–1.20) | |
| TMIG-IC | 1 | 1.05 (1.004–1.09) | 1.00 (0.96–1.04) | 1.05 (0.99–1.12) |
| 2 | 1.11 (1.07–1.15) | 1.02 (0.99–1.06) | 1.14 (1.08–1.21) |
IRR incident rate ratio, 95% CI 95% confidence interval, IADL instrumental activity of daily life, IA intellectual activity, SR social role, TMIG-IC Tokyo Metropolitan Institute of Gerontology Index of Competence.
*Incapable of any one task/activity.
**Incapable of any two tasks/activities. IRRs and 95% CIs were adjusted for age, sex, marital status, educational attainment, equivalized income, household structure, smoking status, self-rated health, medical checkup, family physician, patient’s questioning attitude, high-risk disease, pneumonia, or influenza vaccination (only for non-receipt of influenza or pneumococcal vaccination), history of influenza or pneumonia, geriatric depression, homeboundness, civic participation, social cohesion, and reciprocity.