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Quality of evidence evaluated by grading of recommendation assessment, development, and evaluation.
| Outcome | Number of studies | Sample size | Confidence intervals (95%) | GRADE | Evidence quality | ||||
|---|---|---|---|---|---|---|---|---|---|
| Limitation | Inconsistency | Indirections | Imprecision | Publication bias | |||||
| AHI | 9 | 584 | MD: -6.18; 95% CI: -9.58 to -2.78 |
-1 | -1 | 0 | 0 | 0 | Low |
| ESS | 4 | 264 | MD: -2.84; 95% CI: -4.80 to -0.16 |
-1 | -1 | 0 | -1 | 0 | Very low |
| LSaO2 | 5 | 376 | MD: 5.29; 95% CI: 2.61 to 7.97 |
-1 | -1 | 0 | -1 | 0 | Very low |
