Patients’ characteristics of the trials included in the meta-analysis.

Abbreviation: AHI = apnea-hypopnea index, LowSO2 = lowest O2 saturation, BMI = body mass index, CPAP = continuous positive airway pressure, NR = not reported.# presented as median (interqurtile range).*p value extracted from original study.Patients’ characteristics of the trials included in the meta-analysis.缩写说明：AHI（呼吸暂停低通气指数，apnea-hypopnea index）、LowSO2（最低血氧饱和度，lowest O2 saturation）、BMI（体质量指数，body mass index）、CPAP（持续气道正压通气，continuous positive airway pressure）、NR（未报告，not reported）。 # 以中位数（四分位间距）形式呈现。 * p值提取自原始研究。 本荟萃分析（meta-analysis）纳入的各项试验的患者基线特征。