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.
Forest plot evaluating effects of acetylcysteine group on Δ%VC compared with control group. (Fixed model: 130 of acetylcysteine, 129 of control, SMD = 0.37, 95% CI 0.13–0.62, P = 0.003). CI = confidence interval, SMD = standardized mean difference, Δ%VC = changes in percentage of vital capacity.
