| Outcome/Subgroup | Studies | Number | MD (N–A) | SE (MD) | Effect estimate (95% CI) | Z test |
| aMD in PaO2 at 15 minutes after turn | George 2002 | 15 | ‐4.533 | 9.284 | ‐4.53 (‐22.73 to 13.66) | 0.49 (P value = 0.63) |
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