Fig. 2. Changes in cough symptom scores over time in the P-CAB and PPI groups.

(A) Changes in cough VAS score. (B) Changes in CSS score.

P-CAB, potassium-competitive acid blocker; PPI, proton pump inhibitor; VAS, visual analogue scale; CSS, cough symptom score. Each score is presented as the mean value and standard error. ^*P < 0.05 and ^**P < 0.01 were compared with baseline, while ^†P < 0.05 and ^††P < 0.01 were compared with month 1.