OBJECTIVE: To examine temporal trends in the US incidence of childhood asthma hospitalizations, in-hospital mortality, mechanical ventilation use, and hospital charges between 2000 and 2009. STUDY DESIGN: This was a serial, cross-sectional analysis of a nationally representative sample of children hospitalized with acute asthma. The Kids Inpatient Database was used to identify children aged <18 years with asthma by International Classification of Diseases, Ninth Revision, Clinical Modification code 493.xx. Outcome measures were asthma hospitalization incidence, in-hospital mortality, mechanical ventilation use, and hospital charges. We examined temporal trends of each outcome, accounting for sampling weights. Hospital charges were adjusted for inflation to 2009 US dollars. RESULTS: The 4 separate years (2000, 2003, 2006, and 2009) of national discharge data included a total of 592805 weighted discharges with asthma. Between 2000 and 2009, the rate of asthma hospitalization in US children decreased from 21.1 to 18.4 per 10000 person-years (13% decrease; Ptrend < .001). Mortality declined significantly after adjusting for confounders (OR for comparison of 2009 with 2000, 0.37; 95% CI, 0.17-0.79). In contrast, there was an increase in the use of mechanical ventilation (from 0.8% to 1.0%, a 28% increase; Ptrend < .001). Nationwide hospital charges also increased from $1.27 billion to $1.59 billion (26% increase; Ptrend < .001); this increase was driven by a rise in the geometric mean of hospital charges per discharge, from $5940 to $8410 (42% increase; Ptrend < .001). CONCLUSION: Between 2000 and 2009, we found significant declines in asthma hospitalization and in-hospital mortality among US children. In contrast, mechanical ventilation use and hospital charges for asthma increased significantly over this same period.
OBJECTIVE: To examine temporal trends in the US incidence of childhood asthma hospitalizations, in-hospital mortality, mechanical ventilation use, and hospital charges between 2000 and 2009. STUDY DESIGN: This was a serial, cross-sectional analysis of a nationally representative sample of children hospitalized with acute asthma. The Kids Inpatient Database was used to identify children aged <18 years with asthma by International Classification of Diseases, Ninth Revision, Clinical Modification code 493.xx. Outcome measures were asthma hospitalization incidence, in-hospital mortality, mechanical ventilation use, and hospital charges. We examined temporal trends of each outcome, accounting for sampling weights. Hospital charges were adjusted for inflation to 2009 US dollars. RESULTS: The 4 separate years (2000, 2003, 2006, and 2009) of national discharge data included a total of 592805 weighted discharges with asthma. Between 2000 and 2009, the rate of asthma hospitalization in US children decreased from 21.1 to 18.4 per 10000 person-years (13% decrease; Ptrend < .001). Mortality declined significantly after adjusting for confounders (OR for comparison of 2009 with 2000, 0.37; 95% CI, 0.17-0.79). In contrast, there was an increase in the use of mechanical ventilation (from 0.8% to 1.0%, a 28% increase; Ptrend < .001). Nationwide hospital charges also increased from $1.27 billion to $1.59 billion (26% increase; Ptrend < .001); this increase was driven by a rise in the geometric mean of hospital charges per discharge, from $5940 to $8410 (42% increase; Ptrend < .001). CONCLUSION: Between 2000 and 2009, we found significant declines in asthma hospitalization and in-hospital mortality among US children. In contrast, mechanical ventilation use and hospital charges for asthma increased significantly over this same period.
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