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Mortality risk among COPD patients according to Global Initiative for Chronic Obstructive Lung Disease (GOLD) 2019 and GOLD 2015 classifications
| GOLD 2015 5-year mortality % | GOLD 2019 5-year mortality % | |
| Group A | 5.8 | 7.5 |
| Group B | 13.8 | 23.2 |
| Group C | 14.1 | 14.8 |
| Group D | 30.8 | 32.8 |
