Figures & data
Figure 1. PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analysis) chart of search strategy.
![Figure 1. PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analysis) chart of search strategy.](/cms/asset/920107ce-6c11-43d2-bebe-851602e64e09/rirs_a_1944271_f0001_ob.jpg)
Table 1. Summary of included studies.
Figure 2. Summary forest plots for the pre–post data (a), low-pressure experimental data (b), and experimental data under pressure (c). The thickness of the grey confidence intervals is proportional to the number of effect sizes reported within studies (J).
![Figure 2. Summary forest plots for the pre–post data (a), low-pressure experimental data (b), and experimental data under pressure (c). The thickness of the grey confidence intervals is proportional to the number of effect sizes reported within studies (J).](/cms/asset/3a9ae457-810b-48c1-aa14-4af762572bfa/rirs_a_1944271_f0002_ob.jpg)
Table 2. Model results.
Table 3. Results of meta-regressions.
Table 4. Results of subgroup analyses.
Figure 3. Funnel plots for the pre–post data (a), low-pressure experimental data (b), and experimental data under pressure (c).
![Figure 3. Funnel plots for the pre–post data (a), low-pressure experimental data (b), and experimental data under pressure (c).](/cms/asset/a2c18037-b25e-4d73-bce4-cb768cf573c5/rirs_a_1944271_f0003_ob.jpg)
Supplemental Material
Download MS Word (30.8 KB)Data availability statement
The meta-analysis data can be found at https://doi.org/10.6084/m9.figshare.14077091
. The meta-analysis code and Supplementary Tables S1 and S2 can be found at https://doi.org/10.6084/m9.figshare.14076065 .