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Box and whisker plot. Mean (open diamonds) and median (horizontal lines) preoperative (preop) (dark bars) and postoperative (postop) (cross-hatched bars) polysomnography (PSG) data for 63 patients who underwent uvulopalatopharyngoplasty (UPPP). AHI = apnea-hypopnea index; LD = lateral decubitus; MOS = minimum oxygen saturation; NREM = nonrapid eye movement; REM = rapid eye movement; S = supine. Whiskers indicate minimum and maximum values.
