Table 4

Variables involved in calculating the severity score in the Bronchiectasis Severity Index

Factorand points for scoring system
Age (years)<50 (0 points)50–69 (2 points)70–79 (4 points)>80 (6 points)
Body Mass Index (kg/m2)<18.5 (2 points)18.5–25 (0 points)26–30 (0 points)>30 (0 points)
FEV1 % predicted>80 (0 points)50–80 (1 point)30–49 (2 points)<30 (3 points)
Hospital admission within last 2 yearsNo (0 points)Yes (5 points)
No of exacerbations in previous 12 months0 (0 points)1–2 (0 points)≥3 (2 points)
MRC breathlessness score1–3 (0 points)4 (2 points)5 (3 points)
P. aeruginosa colonisationNo (0 points)Yes (3 points)
Colonisation with other organismsNo (0 points)Yes (1 point)
Radiological severity<3 lobes affected (0 points)≥3 lobes or cystic bronchiectasis in any lobe (1 point)
  • 0-4 Points=mild disease; 5–8=moderate disease; 9 and over=severe disease.

  • MRC, Medical Research Council.