Changes in the national prevalence of asthma and coronavirus disease 2019 fatality: A population-based cross-sectional study.

When the prevalence of asthma was estimated only among patients with COVID-19 ( Table 2 ), a significant trend was observed, both in children and adults, with decreases in the asthma prevalence rates in waves II (odds ratio [OR], 0.74; P = .008; OR, 0.73; P < .001, respectively), III (OR, 0.62; P < .001; OR, 0.58; P < .001, respectively), IV (OR, 0.68; P < .001; OR, 0.70; P < .001, respectively) and V (OR, 0.53; P < .001; OR, 0.62; P < .001, respectively) compared with those in wave I ( Table 2 ).

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Mortality (Case Fatality Rate) Owing to Coronavirus Disease 2019 Among Children and Adults With Asthma As seen in Table 3 , there was a decreasing trend of fatalities from COVID-19 among patients with asthma from pandemic waves I to V.

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