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Table 1 Diagnosis of severe asthma exacerbation according to the British Guideline on the Management of Asthma for children in hospital

From: Continuous versus intermittent short-acting β2-agonists nebulization as first-line therapy in hospitalized children with severe asthma exacerbation: a propensity score matching analysis

Age (years)Severe asthma
Age 1–5SpO2 < 92%
Too breathless to talk or eat
HR > 140/min
RR > 40/min
Use of accessory neck muscles
Without features of life-threatening asthma
Age > 5SpO2 < 92%
PEF 33–50% best or predicted
Too breathless to talk or eat
HR > 125/min
RR > 30/min
Use of accessory neck muscles
Without features of life-threatening asthma
  1. Abbreviations: HR Heart rate; PEF Peak expiratory flow; RR Respiratory rate; SpO2 Room air oxygen saturation