Figure 3 Reflux symptom index scores before and after UPPP surgery in different groups. (A) All individual variables (except hoarseness) in the RSI improved significantly after surgery. Except hoarseness and postnasal drip, all variables in the RSI improved significantly after successful surgery (B), but all variables in the RSI showed no significantly changes after unsuccessful surgery (C). ∗ 𝑃 < 0.05 compared with before UPPP group.