Data are presented as median ± SD. BMI: body mass index, AHI: apnea/hypopnea index, ESS: Epworth Sleepiness Scale (range 0-24), L-SpO2: lowest blood oxygen saturation during recording time, CT90%: percentage of recording time when oxygen saturation of arterial blood<90%, RSI: reflux symptom index, RFS: reflux finding score.

Table 2 Reflux symptom index and reflux finding score between mild-moderate OSA and severe OSA patients before UPPP