Fig 1

Statistical analysis of AHI, mini SpO₂ value, ESS scores and BMI of the 40 patients before surgery, at the time of extubation, and 3 months after extubation (a). Descriptive statistics of AHI, mini SpO₂ value, ESS scores and BMI of patients undergoing SCPL or VPL in 3 time points (b). Estimated marginal means of AHI, mini SpO₂, ESS and BMI with two groups (c). AHI, apnea/hypopnea index; ESS, epworth sleepiness scale; BMI, body mass index; PRE, preoperation; TR, night of tube removal; PO, 3 months after tube removal; SCPL, supracricoid partial laryngectomy; VPL, vertical partial laryngectomy. *P < 0.05, **P < 0.01