Abs P15 Table The relationship between sputum colour and lung function, health-related quality of life and radiological disease severity
Variable mean ± SDMucoid sputumMucopurulent sputumPurulent sputum
Number206660
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/FVC0.74 ± 0.160.72 ± 0.210.65 ± 0.15*†
Total SGRQ score (units)31.5 ± 19.736.3 ± 20.744.1 ± 21.2*
Number of lobes involved3.0 ± 1.63.4 ± 1.54.0 ± 1.5*†
% With cystic bronchiectasis020.7‡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.