Table 1.
Demographic characteristics of 540 patients infected with 2009 pandemic H1N1 influenza virus in Austria (September 2009–February 2010)
| Characteristic | All cases | Hospitalised patients | ICU patients | Fatal casesa |
|---|---|---|---|---|
| All patients | 540 (100) | 343/540 (63.5) | 49/540 (9.1) | 14/341 (4.1) |
| Female | 203 (37.6) | 102/203 (50.2) | 21/203 (10.3) | 4/100 (4.0) |
| Male | 337 (62.4) | 241/337 (71.5) | 28/337 (8.3) | 10/241 (4.1) |
| Age groupb | ||||
| 0–23 months | 33 (6.1) | 24/33 (72.7) | 3/33 (9.1) | 0/24 (0.0) |
| 2–4 years | 27 (5.0) | 14/27 (51.9) | 1/27 (3.7) | 0/14 (0.0) |
| 5–9 years | 64 (11.9) | 14/64 (21.5) | 1/64 (1.6) | 0/14 (0.0) |
| 10–17 years | 101 (18.7) | 29/101 (28.7) | 3/101 (3.0) | 0/29 (0.0) |
| 18–29 years | 166 (30.7) | 140/166 (84.3) | 3/166 (1.8) | 1/140 (0.7) |
| 30–64 years | 119 (22.0) | 92/119 (77.3) | 26/119 (21.8%) | 8/90 (8.9) |
| ≥65 years | 30 (5.6) | 30/30 (100.0) | 12/30 (40.0) | 5/30 (16.7) |
Data are presented as no. (%). Because of rounding, the percentages may not total 100
aDeath was recorded for inpatients only and was not available for two patients
bThe median age of the patients was 19.3 years (range 26 days–90.8 years). Percentages of inpatients, ICU patients and fatal cases refer to all cases within the age groups