From: The AIMAR recommendations for early diagnosis of chronic obstructive respiratory disease based on the WHO/GARD model*
Score (from[91]
0
1
2
3
FEV1 (%pred.)
≥ 65%
50-64%
36-49%
≤ 35%
Distance walked in 6 mins (m)
≥ 350
250-349
150-249
≤ 149 m
Level of dyspnea (MRC)
0-1
4
Body mass index (BMI)
≥ 21
≤ 21