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. 2021 Nov 12;36(8):2700–2706. doi: 10.1053/j.jvca.2021.11.006

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Fig 3 — (A) A forest plot visualizing extracorporeal membrane oxygenation duration in patients with COVID-19 and influenza. Mean difference 2.02 days (95% CI [–0.52 to 4.57]; I² = 63%; P of heterogeneity = 0.03) ordered by treatment effects. (B) A forest plot of mechanical ventilation duration pre-extracorporeal membrane oxygenation in patients with COVID-19 versus influenza. Mean difference 3.12 days (95% CI [2.64-3.59]; I² = 0%; P of heterogeneity = 0.58) ordered by treatment effects. ECMO, extracorporeal membrane oxygenation; MV, mechanical ventilation; MD, mean difference.