Volume 18, Number 5—May 2012
Dispatch
Emergency Department Visits for Influenza A(H1N1)pdm09, Davidson County, Tennessee, USA
Wesley H. Self, Carlos G. Grijalva, Yuwei Zhu, H. Keipp Talbot, Astride Jules, Kyle E. Widmer, Kathryn M. Edwards, John V. Williams, David K. Shay, and Marie R. Griffin
Table 2
Estimated emergency department visits for influenza A(H1N1)pdm09, Davidson County, Tennessee, USA, May 1, 2009–March 31, 2010*
| Patient age, y | County population | No. visits/1,000 population (95% CI) |
|
|---|---|---|---|
| Surveillance sampling estimates | Capture–recapture estimates | ||
| <5 | 47,446 | 26.3 (15.2–42.7) | 19.3 (11.0–38.3) |
| 5–17 | 93,710 | 16.3 (8.90–27.9) | 22.0 (12.0–46.5) |
| 18–49 | 318,006 | 10.9 (7.48–17.2) | 9.08 (5.67–22.6) |
| >50 | 176,548 | 2.85 (1.05–7.77) | 3.60 (NC) |
| Total | 635,710 | 10.6 (6.48–18.0) | 10.2 (NC) |
*NC, not calculated because of no matched cases in patients >50 years of age.
