TABLE 1.
Demographic characteristics of patients identified in the matched database (N = 1,310)
| Variable | n (%) |
|---|---|
| Age group | |
| 18–49 years | 249 (19.0) |
| 50–64 years | 449 (34.3) |
| 65–74 years | 311 (23.7) |
| 75 + years | 301 (23.0) |
| Race | |
| White | 848 (64.7) |
| Black | 421 (32.1) |
| Other, unknown | 41 (3.2) |
| Sex | |
| Female | 824 (62.9) |
| Male | 486 (37.1) |
| Season | |
| 2016–2017 | 356 (27.2) |
| 2017–2018 | 449 (34.3) |
| 2018–2019 | 505 (38.5) |
| Vaccination status | |
| Unvaccinated | 447 (34.1) |
| Vaccinated ≥14 days prior to illness onset | 766 (58.5) |
| Vaccinated <14 days prior to illness onset | 97 (7.4) |
| Prior year vaccination (total for all seasons) | |
| No | 645 (49.2) |
| Yes | 665 (50.8) |
| Influenza status | |
| No | 973 (74.3) |
| Yes | 337 (25.7) |