| Outcome/Subgroup | Studies |
Number (n/N) |
MD (S–R) | SE (MD) | Effect estimate (95% CI) | Z test |
| a,bMD in PaO2 at 30 minutes after turn | 1 | 30 | Insufficient data | |||
| 4.9.1. Subgroup with left lower lobe atelectasis | Chan 1992 | 5/30 | ‐5.00 | 5.683 | ‐5.00 (‐16.14 to 6.14) | 0.88 (P value = 0.38) |
| 4.9.2. Subgroup with no atelectasis | Chan 1992 | 3/30 | ‐3.67 | 2.728 | ‐3.67 (‐9.01 to 1.68) | 1.34 (P value = 0.18) |
| 4.9.3. Subgroup with right lower lobe atelectasis | Chan 1992 | 1/30 | Effect estimate unable to be calculated. |
|||
| 4.9.4. Subgroup with bilateral atelectasis | Chan 1992 | 21/30 | Effect estimate unable to be calculated. |
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