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COPD severity stage according to the GOLD 2011 guidelines
| COPD severity stage according to the GOLD 2011 | Total N = 2597 (100%) | Men n = 1667 (100%) | Women n = 917 (100%) | P-value* |
|---|---|---|---|---|
| A | 385 (14.8) | 210 (12.6) | 172 (18.8) | 0.0001 |
| B | 270 (10.4) | 183 (11.0) | 86 (9.4) | |
| C | 1031 (39.7) | 663 (39.8) | 364 (39.7) | |
| D | 911 (35.1) | 611 (36.6) | 295 (32.2) |
Results of χ2 test.
