Figure 4.
Subgroup analysis for the association between COPD and risk of BPF in the subgroups stratified by operative modes. BPF, bronchopleural fistula; CI, confidence interval; COPD, chronic obstructive pulmonary disease; OR, odds ratio.
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.