Evidence-based On-call

Asthma exacerbation

Clinical features

Ask about difficulty performing work or other activities due to physical health within last 4 weeks ^a

Why?

Problems with breathing in the last 4 weeks increase the risk of asthma relapse

Patient	Prognostic Factor	Outcome	CER	OR (95% CI)	NNF+ (95% CI)
severe asthma exacerbation ^a	difficulty performing work or other activities due to physical health within last 4 weeks independent	relapse at 8 weeks	45% (39% to 51%)	2.7 (1.6 to 4.3)	4 (3 to 9)