Time for half-decrease of the level during recovery () parameter estimates obtained using 3 models and 3 statistical approaches.

<p>The estimates are provided together with their associated standard error (SE) and <i>p</i>-values. The difference in between patients with moderate and severe COPD (GOLD stages 4 vs. 2) is also reported.Three summarization methods are investigated (mixed effects, meta-analysis and weighted regres... View More