Table 2.
Main characteristics of the four studies using a propensity-matched analysis
| Author | Guervilly et al. [5] | Rilinger et al. [26] | Giani et al. [8] | Petit et al. [10] | ||||
|---|---|---|---|---|---|---|---|---|
| Year of publication | 2019 | 2020 | 2021 | 2021 | ||||
| Prone positioning | Yes | No | Yes | No | Yes | No | Yes | No |
| No. patients | 50 | 50 | 38 | 38 | 66 | 66 | 59 | 59 |
| Only COVID patients | No | No | No | No | ||||
| Age | 50 ± 14 | 50 ± 14 | 51.5 (38.5–64) | 55.5 (44–62.5) | 47 ± 12 | 47 ± 14 | 53 (46–61) | 51 (45–59) |
| Male gender, no. (%) | 31 (62) | 34 (68) | 28 (74) | 32 (84) | 43 (65) | 44 (67) | 40 (68) | 42 (71) |
| SOFA score | 10 ± 4 | 11 ± 4 | 13 (11–15) | 12.0 (8.8–16) | 10 ± 3 | 10 ± 3 | 12 (8–16) | 13 (9–17) |
| Pneumonia as main cause of ARDS, no. (%) | 32 (64) | 42 (84) | 33 (87) | 32 (84) | 60 (91) | 60 (91) | 47 (80) | 45 (76) |
| Prone positioning prior ECMO, no | 34 (68) | 29 (58) | 7 (18) | 9 (24) | 16 (31)a | 26 (39) | 50 (85) | 48 (81) |
| Duration invasive mechanical ventilation—ECMO initiation | 4 ± 5 | 4 ± 5 | 2.2 (0.2–7.6) | 1.7 (0.1–6.5) | 2 (1–4) | 2 (0–4) | 4 (1–9) | 4 (2–10) |
aInformation available for 51 patients