Table 2

Severity of self-reported cough in subjects with asthma and COPD using a variety of measures, and its relationship to regular treatment

	n	Asthma		n		COPD
	n			n		Median C5 (μM)			Median C5 (μM)
Cough present	43	Cough most days	61%	16	57		Cough most days	81%	31
		No cough most days		39%			250	No cough most days		9%	31
		No cough most days					(p=0.015)	No cough most days			(p=0.8)

Severity of cough	43	Mild	54%	125	57		Mild	31%	125
		Moderate	37%	63			Moderate	56%	16
		Severe		10%			16	Severe		12%	8
		Severe					(p=0.014)	Severe			(p=0.1)

Sputum production	43	Usually	51%	16	57		Usually	56%	31
		Occasionally	28%	125			Occasionally	26%	31
		Rarely		21%			500	Rarely		16%	125
		Rarely					(p=0.014)	Rarely			(p=0.8)

Anticholinergic therapy	53	Prescribed	21%	8	57		Prescribed	82%	31
		Not prescribed		79%			125	Not prescribed		18%	250
		Not prescribed					(p=0.02)	Not prescribed			(p=0.03)

Inhaled corticosteroid therapy	53	Low dose	26%	93	57		Prescribed	35%	63
		Moderate dose	62%	63			Not prescribed		65%	31
		High dose		12%					125		(p=0.6)
		High dose							(p=0.7)