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Population-based incidence estimates of influenza-associated respiratory failure hospitalizations, 2003 to 2009.

Abstract：

RATIONALE:The incidence of influenza-associated acute respiratory failure is unknown. OBJECTIVES:To estimate the population-based incidence of influenza-associated acute respiratory failure hospitalizations. METHODS:This is a cohort study from January 2003 through March 2009 using hospitalization databases for Arizona, California, and Washington from the Healthcare Cost and Utilization Project and influenza surveillance data for regions encompassing these states. Acute respiratory failure requiring mechanical ventilation was defined by International Classification of Diseases-9-CM code. We used negative-binomial regression modeling to estimate the incidence of influenza-associated events. MEASUREMENTS AND MAIN RESULTS:The incidence of influenza-associated acute respiratory failure was 2.7 per 100,000 person-years (95% confidence interval, 0.2-23.5), and during the influenza season, 3.8% of all respiratory failure hospitalizations were attributable to influenza. Compared with adults aged 18-49 years, the incidence rate ratio for influenza-associated acute respiratory failure was lower among children aged 1-4 (0.9) and 5-17 years (0.3); however, it was higher among adults aged 50-64 (4.8), 65-74 (10.4), 75-84 (19.9), and 85 years and older (33.7). Results were similar with more sensitive and specific outcome definitions and in a sensitivity analysis using only Arizona-specific outcome and surveillance data. CONCLUSIONS:Our data indicate that influenza was an important contributor to respiratory failure hospitalizations during 2003-2009. Clinicians should maintain a high index of suspicion for influenza among hospitalized patients with acute respiratory illness when influenza is circulating in a community. Influenza has a greater effect on respiratory failure in the elderly, for whom better prevention measures are needed.

journal_name

Am J Respir Crit Care Med

journal_title

American journal of respiratory and critical care medicine

authors

Ortiz JR,Neuzil KM,Rue TC,Zhou H,Shay DK,Cheng PY,Cooke CR,Goss CH

doi

10.1164/rccm.201212-2341OC

subject

Has Abstract

pub_date

2013-09-15 00:00:00

pages

710-5

issue

eissn

1073-449X

issn

1535-4970

journal_volume

188

pub_type

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Population-based incidence estimates of influenza-associated respiratory failure hospitalizations, 2003 to 2009.