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The Status of Asthma in the United States

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Figure 1.

Prevalence of current asthma and asthma attacks among all ages by year. The Pvalue of the trend line slope is significant at P < .05. The trend line is based on estimates from the statistical model and observed prevalence estimates (estimates as is from the survey data) (dots). The trend slope is numbered (slope 1, slope 2) when there is more than one significant trend line, as in the current asthma trend lines. Data source: National Center for Health Statistics, National Health Interview Survey, 2010–2021 (14).

Prevalence of current asthma and asthma attacks among all ages by year. The Pvalue of the trend line slope is significant at P < .05. The trend line is based on estimates from the statistical model and observed prevalence estimates (estimates as is from the survey data) (dots). The trend slope is numbered (slope 1, slope 2) when there is more than one significant trend line, as in the current asthma trend lines. Data source: National Center for Health Statistics, National Health Interview Survey, 2010–2021 (14).
Year Current asthma Asthma attacks
Observed Modeled Observed Modeled
2010 51.9 51.96 8.5 8.69
2011 49.1 50.82 8.5 8.37
2012 50.7 49.69 8.3 8.06
2013 49.9 48.59 7.3 7.77
2014 44.7 47.51 7.7 7.78
2015 46.9 46.46 7.8 7.79
2016 46.9 45.43 8.3 7.8
2017 45.6 44.42 7.9 7.81
2018 45.4 43.43 7.7 7.81
2019 41.2 42.47 7.8 7.82
2020 41.0 41.53 7.8 7.83

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Figure 2.

Asthma-related health care use and death rate among all ages by year. The P value of trend line slope is significant at .05. The trend line is based on estimates from the statistical model and observed prevalence estimates (estimates as is from the survey data) (dots). The trend slopes are numbered (slope 1, slope 2) when there is more than 1 significant trend line, as in the current asthma trend lines. The health care use rate is shown as the number of hospitalizations and emergency department visits per the US Census resident population for the given year. Data sources: asthma emergency department visits and hospitalizations: Healthcare Cost and Utilization Project, National (Nationwide) Inpatient Sample (16) and National (Nationwide) Emergency Department Sample (15), Agency for Healthcare Research and Quality. Asthma deaths: CDC Wonder (Wide-Ranging Online Data for Epidemiologic Research) (17).

Asthma-related health care use and death rate among all ages by year. The P value of trend line slope is significant at .05. The trend line is based on estimates from the statistical model and observed prevalence estimates (estimates as is from the survey data) (dots). The trend slopes are numbered (slope 1, slope 2) when there is more than 1 significant trend line, as in the current asthma trend lines. The health care use rate is shown as the number of hospitalizations and emergency department visits per the US Census resident population for the given year. Data sources: asthma emergency department visits and hospitalizations: Healthcare Cost and Utilization Project, National (Nationwide) Inpatient Sample (16) and National (Nationwide) Emergency Department Sample (15), Agency for Healthcare Research and Quality. Asthma deaths: CDC Wonder (Wide-Ranging Online Data for Epidemiologic Research) (17).
Year Observed Modeled
Asthma emergency department visits
2010 62.6 65.64
2011 62.3 63.42
2012 65.1 61.29
2013 62.6 59.22
2014 61.3 57.22
2015 50.2 55.29
2016 52.8 53.43
2017 48.6 51.63
2018 50.2 49.89
2019 46.4 39.22
2020 29.8 30.83
Asthma inpatient hospital stays
2010 13 12.88
2011 11.8 12.27
2012 11.9 11.68
2013 11 11.13
2014 10.7 10.6
2015 9.2 8.76
2016 5.8 7.23
2017 5.6 5.98
2018 5.5 4.94
2019 5.2 4.08
2020 2.9 3.37
Asthma mortality
2010 11 11.07
2011 10.7 11.08
2012 11.2 11.09
2013 11.5 11.1
2014 11.5 11.1
2015 11.2 11.11
2016 10.9 11.12
2017 10.9 11.13
2018 10.5 11.14
2019 10.7 11.15
2020 12.6 11.15
2021 10.6 11.16

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