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. 2020 Nov 9;21:294. doi: 10.1186/s12931-020-01554-2

Fig. 3.

Fig. 3

Subgroup analysis depended on different severity of OSA patients compared to the controls was displayed in meta-analysis. The means of expression are SMD and its 95%CI. SMD: standard mean difference; CI: confidence interval; OSA: obstructive sleep apnea