Table 1. Rates of influenza A(H1N1)pdm09-associated mortality among influenza-like illness (ILI) cases at three sentinel cities in Argentina, according to age group. April–December, 2009.
| Row number, Category | Age group | ||||
| <5 years | 5–44 years | 45–64 years | ≥65 years | All ages | |
| 1. Number of decedents with a history of ILI identified through active surveillance with date of illness onset information | 6 | 34 | 39 | 25 | 104 |
| 2. Influenza A(H1N1)pdm09 positives among those sampled, n/N (%) | 4/4 (100%) | 22/30 (73%) | 15/27 (56%) | 8/13 (62%) | 49/74 (66%) |
| 3. Estimated number of influenza A(H1N1)pdm09-associated deathsa | 4 (95%CI 4–4) | 24 (95%CI 26–24) | 19 (95%CI 21–18) | 13 (95%CI 13–13) | 66 (95%CI 72–59) |
| 4. Population estimates for area under active surveillance | 222,681 | 1,549,706 | 489,965 | 250,019 | 2,512,370 |
| 5. Estimated rates of 2009 H1N1mortality per 100,000 personsb | 1.8 (95%CI 1.8–1.8) | 1.5 (95%CI 1.7–1.5) | 4.1 (95%CI 4.4–3.8) | 5.6 (95%CI 5.6 –5.6) | 2.7 (95%CI 3.0–2.4) |
a
Estimated by multiplying the week-specific number of decedents identified (row 1) by the week-specific proportion testing positive for 2009 H1N1 (row 2) and its 95% confidence interval.
b
Corrected for the proportion of case-patients missing date of illness onset (epidemiologic week) information (i.e. 2 of 39 among persons aged 45–64 years and 2 of 27 among persons aged ≥65 years).