Figure Legends
Figure 1. Flow chart showing the study design.
Figure 2. Left panel: overall cumulative hazard ratios for BVFL in the OSA group and the control (non-OSA) group. Right panel: cumulative incidence rates for BVFL in those with OSA operation and those with no OSA operation. OSA, Obstructive Sleep Apnea; BVFL, Benign Vocal Fold Lesion
Figure 3. Forest plot of the cumulative hazard ratio for each factor (OSA, OSA surgery, age, sex, residential area, economica status, underlying diseases (hypertension, diabetes, chronic renal disease))
Figure 4. Subgroup analysis of age, residential area, economic status, and sex.