Skip directly to site content Skip directly to page options Skip directly to A-Z link Skip directly to A-Z link Skip directly to A-Z link
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. GriffinComments to Author 
Author affiliations: Vanderbilt University, Nashville, Tennessee, USA (W.H. Self, C.G. Grijalva, Y. Zhu, H.K. Talbot, A. Jules, K.E. Widmer, K.M. Edwards, J.V. Williams, M.R. Griffin); Veterans Affairs Tennessee Valley Health Care System, Nashville (W.H. Self, M.R. Griffin); Centers for Disease Control and Prevention, Atlanta, Georgia, USA (D.K. Shay)

Main Article

Table 1

Estimated total number of emergency department visits for influenza A(H1N1)pdm09, calculated by surveillance sampling method, Davidson County, Tennessee, USA, May 1, 2009–March 31, 2010*

Patient age, y No. ARI or fever visits countywide†
 % ARI or fever visits to surveillance emergency departments for influenza A(H1N1)pdm09‡
 Estimated no. visits for influenza A(H1N1)pdm09 countywide
Prepeak Peak Postpeak Prepeak Peak Postpeak
<5 3,135 6,461 5,219 0 19.0 0 1,249
5–17 1,599 5,269 2,324 15.0 24.0 0 1,528
18–49 7,322 11,523 10,486 2.4 23.0 6.3 3,455
>50 5,085 6,832 7,046 0 6.2 1.5 503

*ARI, acute respiratory infection.
†Data from Tennessee Hospital Discharge Data System (9).
‡Data from Influenza Vaccine Effectiveness Study (Vanderbilt University, Nashville, TN, USA).

Main Article

References
  1. Centers for Disease Control and Prevention. Update: novel influenza A (H1N1) virus infections—worldwide, May 6, 2009. MMWR Morb Mortal Wkly Rep. 2009;58:453–8.PubMedGoogle Scholar
  2. Jain  S, Kamimoto  L, Bramley  AM, Schmitz  AM, Benoit  SR, Sugerman  DE, Hospitalized patients with 2009 H1N1 influenza in the United States, April–June 2000. N Engl J Med. 2009;361:1935–44. DOIPubMedGoogle Scholar
  3. McDonnell  WM, Nelson  DS, Schunk  JE. Should we fear “flu fear” itself? Effects of H1N1 influenza on ED use. Am J Emerg Med. 2012;30:275–82. DOIPubMedGoogle Scholar
  4. Shapiro  JS, Genes  N, Kuperman  G, Chason  K, Richardson  LD. Health information exchange, biosurveillance efforts, and emergency department crowding during the spring 2009 H1N1 outbreak in New York City. Ann Emerg Med. 2010;55:274–9. DOIPubMedGoogle Scholar
  5. Institute of Medicine. Committee on the future of emergency care in the US health system, hospital-based emergency care: at the breaking point. Washington (DC): National Academy of Sciences; 2007.
  6. Moskop  JC, Sklar  DP, Geiderman  JM, Schears  RM, Bookman  KJ. Emergency department crowding, part 1—concepts, causes and moral consequences. Ann Emerg Med. 2009;53:605–11. DOIPubMedGoogle Scholar
  7. Talbot  HK, Griffin  MR, Chen  Q, Zhu  Y, Williams  JV, Edwards  KM. Effectiveness of seasonal vaccine in preventing confirmed influenza-associated hospitalizations in community dwelling older adults. J Infect Dis. 2011;203:500–8. DOIPubMedGoogle Scholar
  8. World Health Organization. CDC protocol of realtime RTPCR for swine influenza A (H1N1). 2009 Apr 28 [cited 2011 Jan 22]. http://www.who.int/csr/resources/publications/swineflu/realtimeptpcr/en/index.html
  9. Talbot  HK, Poehling  KA, Williams  JV, Zhu  Y, Chen  Q, McNabb  P, Influenza in older adults: impact of vaccination of school children. Vaccine. 2009;27:1923–7. DOIPubMedGoogle Scholar
  10. Annual estimates of the resident population by sex, and selected age groups for the United States: April 1, 2000 to July 1, 2009. Population estimates. National characteristics: vintage 2009 [cited 2011 Jan 22]. http://www.census.gov/popest/data/national/asrh/2009/index.html.
  11. Hook  EB, Regal  RR. Capture–recapture methods in epidemiology: methods and limitations. Epidemiol Rev. 1995;17:243–64.PubMedGoogle Scholar
  12. Centers for Disease Control and Prevention. FluView: a weekly influenza surveillance report prepared by the Influenza Division [cited 2011 Dec 22]. http://www.cdc.gov/flu/weekly/weeklyarchives2009-2010/09-10summary.htm
  13. Wittes  JT. On the bias and estimated variance of Chapman’s two-sample capture–recapture population estimate. Biometrics. 1972;28:592–7. DOIGoogle Scholar
  14. Gjini  A, Stuart  JM, George  RC, Nichols  T, Heyderman  RS. Capture–recapture analysis and pneumococcal meningitis estimates in England. Emerg Infect Dis. 2004;10:87–93.PubMedGoogle Scholar

Main Article

Page created: April 05, 2012
Page updated: April 05, 2012
Page reviewed: April 05, 2012
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.
file_external