Table 2.
Geographic and Demographic Characteristics of Patients Who Were Hospitalized for or Died of 2009 H1N1 Infection, by Pandemic Wave, Wisconsin, 15 April 2009 through 2 January 2010
| Characteristic | Wave 1 | Wave 2 | Pa |
| Geographic | |||
| City of Milwaukee residence | 163/252 (65) | 148/1077 (14) | <.001 |
| Wisconsin counties affectedb | 23/72 (32) | 69/72 (96) | <.001 |
| Demographic | |||
| Female sex | 142/252 (56) | 578/1077 (54) | .44 |
| Age, median years (range) | 28.0 (<1-85) | 34.0 (<1-96) | .03 |
| Age | |||
| <18 years | 94/252 (37) | 352/1076 (33) | |
| 18–49 years | 99/252 (39) | 372/1076 (35) | .01 |
| ≥50 years | 59/252 (23) | 352/1076 (33) | |
| Race/ethnicityc | |||
| White, non-Hispanic | 72/252 (29) | 582/853 (68) | |
| Black, non-Hispanic | 121/252 (48) | 124/853 (15) | <.001 |
| Hispanic | 40/252 (16) | 94/853 (11) | .04 |
| Asian | 19/252 (8) | 28/853 (3) | .003 |
| American Indian/Alaskan Native | 0/252 (0) | 20/853 (2) | .01 |
| Other | 0/252 (0) | 5/853 (1) | .59 |
NOTE. Wave 1 refers to 15 April through 30 August 2009; wave 2 refers to 31 August 2009 through 2 January 2010. Patients included were Wisconsin residents who were hospitalized ≥24 h or who died of laboratory-confirmed or probable 2009 H1N1 infection. Data are proportion (%) of patients and deaths unless otherwise specified.
Determined by the Pearson χ2, Fisher exact, Cochran-Mantel-Haenszel, or Wilcoxon-Mann-Whitney test.
Number of Wisconsin counties with ≥1 reported hospitalized case or death in a resident. There are 72 counties in Wisconsin.
Includes only patients with known race/ethnicity.