| Outcome | Deletion | Result |
| AHI | Chen et al. 2008 | , , | MD-6.28, 95% CI: -9.77 to -2.79 | Freire et al. 2007 | , , | MD-5.42, 95% CI: -8.90 to -1.95 | Li et al. 2017 | , , | MD-5.39, 95% CI: -8.49 to -2.30 | Pan 2012 | , , | MD-6.84, 95% CI: -10.59 to -3.10 | Song et al. 2015 | , , | MD-5.50, 95% CI: -9.20 to -1.79 | Su. 2018 | , , | MD-7.10, 95% CI: -10.62 to -3.58 | Xu et al. 2017 | , , | MD-6.82, 95% CI: -10.55 to -3.09 | Zhang et al. 2014 | , , | MD-6.07, 95% CI: -9.78 to -2.35 | Zhao 2015 | , , | MD-6.07, 95% CI: -9.68 to -2.46 |
| ESS | Li et al. 2017 | , , | MD-2.43, 95% CI: -6.24 to 1.38 | Song et al. 2015 | , , | MD-1.55, 95% CI: -4.05 to 0.94 | Su 2018 | , , | MD-3.60, 95% CI: -5.40 to -1.80 | Zhao 2015 | , , | MD-2.19, 95% CI: -4.97 to 0.58 |
| LSaO2 | Chen et al. 2008 | , , | MD-6.15, 95% CI: 3.67 to 8.62 | Li et al. 2017 | , , | MD-4.86, 95% CI: 1.89 to 7.83 | Pan 2012 | , , | MD-5.89, 95% CI: 2.18 to 9.61 | Song et al. 2015 | , , | MD-4.39, 95% CI: 1.80 to 6.99 | Xu et al. 2017 | , , | MD-5.10, 95% CI: 1.06 to 9.15 |
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