TABLE 3.
Dementia events, cumulative incidence %, and incidence rate per 10,000 person‐years (PY), patients ≥65 years old
| VHA | Total n | Dementia events | Person‐years | Cumulative incidence % | Incidence rate per 10,000PY |
|---|---|---|---|---|---|
| VHA | |||||
| Overall | 80,070 | 14,141 | 450,911.25 | 17.7% | 314.0/10,000PY |
| Four group | |||||
| No vaccine | 63,021 | 11,895 | 342,580.47 | 18.9% | 347.2/10,000PY |
| Tdap only | 3874 | 542 | 23,155.81 | 14.0% | 234.1/10,000PY |
| HZ only | 11,434 | 1546 | 73,017.78 | 13.5% | 211.7/10,000PY |
| Tdap + Hz | 1741 | 158 | 12,157.19 | 9.1% | 130.0/10,000PY |
| MarketScan | |||||
| Overall | 129,200 | 2268 | 403,141.07 | 1.8% | 56.2/10,000PY |
| Four group | |||||
| No vaccine | 101,819 | 1928 | 314,691.87 | 1.9% | 61.3/10,000PY |
| Tdap only | 9816 | 114 | 30,960.01 | 1.6% | 36.8/10,000PY |
| HZ only | 13,774 | 191 | 44,305.23 | 1.4% | 43.1/10,000PY |
| Tdap + Hz | 3791 | 35 | 13,183.96 | 0.9% | 26.5/10,000PY |