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.
Respiratory viral infection and COPD stage
| GOLD Stage | Respiratory virus screen status |
|
|---|---|---|
| Respiratory virus positive (%) | Respiratory virus negative | |
| 1 | 0 (0) | 1 |
| 2 | 11 (31) | 24 |
| 3 | 16 (31) | 35 |
| 4 | 23 (47)a | 26 |
Chi squared test, comparison of groups 1–3 with group 4, linear-by-linear association p < 0.05.
