Table 1. Demographics of residents hospitalized with 2009 influenza (A) H1N1 in Illinois, April–December, 2009.
| Characteristic | Value |
| No. of residents hospitalized | 2,824 |
| Male, no. (%)a | 1,333 (47) |
| Median age, yrs (IQR)b | 23.7 (6–49) |
| Admitted to ICUc, no. (%) | 421 (15) |
| Reported ≥1medical co morbidity | 324 (11) |
| Co morbidity prevalence, (number with ≥1 co morbidity/total admitted [%]) | |
| White | 76/1,068 (7) |
| Black | 126/707 (18) |
| Asian/Native Hawaiian/Pacific Islander | 8/107 (7) |
| Native America/American Indian | 0/6 (0) |
| Hispanic | 80/680 (12) |
| Other | 6/63 (10) |
| Unknown | 28/193 (15) |
| Received antiviral therapy, no. (%) | 1,688 (60) |
| Median hospital length of stayc, days, (IQR)b | 2 (1–4) |
| Total inpatient days | 7,651 |
| Pregnant, no. (%) | 110 (3.9) |
| Age Group | |
| <1 year, no. (%) | 257 (9) |
| 1–4 yrs, no. (%) | 322 (11) |
| 5–24 yrs, no. (%) | 885 (31) |
| 25–49 yrs, no. (%) | 706 (25) |
| 50–64 yrs, no. (%) | 470 (17) |
| ≥65 yrs, no. (%) | 184 (7) |
| Hospital type | |
| Teaching hospital, no. (%) | 1,439 (51) |
| Community hospital, no. (%) | 1,231(44) |
| Unknown, No. (%) | 154 (5) |
a
Percentages might total more than 100 because of rounding.
b
Interquartile range.
c
Intensive care unit.