Table 1 : Summary of GOLD spirometry and BODE index and its component variables
scores in grading the severity of COPD.

Severity of COPD can be categorized as mild/stage I, moderate/stage II, severe/stage III
and very severe/stage IV based on GOLD spirometry post bronchodilator FEV1% predicted result;
as BODE/quartile 1/score 0, BODE/quartile 2/score 1, BODE/quartile 3/score 2 and BODE/quartile
4/score 3 based on points/scores of BODE index.

Reta et al.Pulmonology and Respiratory Research  2018 6:1DOI : 10.7243/2053-6739-6-1