From: Acute severe asthma in emergency department: clinical characteristics, risk factors, and predictors for poor outcome
Odds ratio
95% confidence interval
P-value
Age (>40 years)
1.11
1.09–2.11
<0.001*
Uncontrolled asthma
2.34
2.01–4.40
SO2 <90%
5.67
3.98–8.50
PEFR (after1-h treatment)
4.44
3.24–7.68