Abs P15 Table The relationship between sputum colour and lung function, health-related quality of life and radiological disease severity

Variable mean ± SD	Mucoid sputum	Mucopurulent sputum	Purulent sputum
Number	20	66	60
FEV₁ (l/min) (% predicted)	1.79 ± 0.81 (77 ± 25)	1.99 ± 0.75 (78.2 ± 24.3)	1.62 ± 0.51*† (65 ± 22)
FVC (l/min) (% predicted)	2.95 ± 0.82 (85 ± 18)	3.25 ± 1.1 (87.4 ± 20)	3.3 ± 0.84*† (78.8 ± 17.7)
FEV₁/FVC	0.74 ± 0.16	0.72 ± 0.21	0.65 ± 0.15*†
Total SGRQ score (units)	31.5 ± 19.7	36.3 ± 20.7	44.1 ± 21.2*
Number of lobes involved	3.0 ± 1.6	3.4 ± 1.5	4.0 ± 1.5*†
% With cystic bronchiectasis	0	20.7‡	45.3*†

*p<0.05 when comparing purulent sputum with mucoid sputum; †p<0.05 when comparing purulent sputum with mucopurulent sputum; ‡p<0.05 when comparing mucopurulent sputum with mucoid sputum. SGRQ, St Georges’s respiratory questionnaire.