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Number of patients on none, single, double, or triple therapy in the groups based on GOLD spirometric grading
| Grade I | Grade II | Grade III | Grade IV | |
|---|---|---|---|---|
| None (%) | 38 (41) | 51 (25) | 10 (9) | 4 (11) |
| Single (%) | 36 (39) | 77 (38) | 33 (29) | 1 (3) |
| Double (%) | 7 (7) | 46 (22) | 33 (29) | 14 (43) |
| Triple (%) | 12 (13) | 31 (15) | 38 (33) | 14 (43) |
Abbreviation: GOLD, Global initiative for chronic Obstructive Lung Disease.
