Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
COPD severity stage according to the GOLD 2017 guidelines
| COPD severity stage according to the GOLD 2017 | Total N = 2597 (100%) | Men n = 1667 (100%) | Women n = 917 (100%) | P-value* |
|---|---|---|---|---|
| A | 1215 (46.8) | 735 (44.1) | 474 (51.7) | 0.0001 |
| B | 619 (23.8) | 394 (23.6) | 222 (24.2) | |
| C | 201 (7.7) | 138 (8.3) | 62 (6.8) | |
| D | 562 (21.6) | 400 (24.0) | 159 (17.3) |
Results of χ2 test.
