TABLE 1.
Characteristics of cases and non-cases.
| Cases (%) | Non-cases (%) | |
| Total reports | 2,822 | 156,495 |
| Sex distribution | ||
| Female | 1,306 (46.3%) | 74,067 (47.3%) |
| Male | 1,516 (53.7%) | 82,428 (52.7%) |
| Median age, years (SD) | 67 (10.9) | 71 (12.6) |
| Age distribution | ||
| 18–34 | 12 (0.4%) | 1,831 (1.2%) |
| 35–64 | 1,086 (38.5%) | 44,128 (28.2%) |
| 65–74 | 1,044 (37%) | 48,665 (31.1%) |
| >75 | 680 (24.1%) | 61,871 (39.5%) |
| Severity | ||
| Initial or prolonged hospitalization | 868 (30.8%) | 76,295 (48.8%) |
| Disability | 265 (9.4%) | 3,346 (2.1%) |
| Life-threatening | 101 (3.6%) | 8,173 (5.2%) |
| Death | 224 (7.9%) | 32,435 (20.7%) |
| Geographical distribution | ||
| America | 1,645 (58.3%) | 105,581 (67.5%) |
| Europe | 770 (27.3%) | 34,961 (22.3%) |
| Asia | 213 (7.5%) | 11,383 (7.3%) |
| Australia | 48 (1.7%) | 1,517 (1.0%) |
| Africa | 3 (0.1%) | 224 (0.1%) |
| Missing | 143 (5.1%) | 2,829 (1.8%) |
SD, Standard Deviation.