Table II. Characteristics and evaluation items of patients.

EGD: Esophagogastroduodenoscopy; GERD: gastroesophageal reflux disease; N.A.: not applicable; VAS: visual analog scale – lower values are better. *Responses: 1: I am satisfied and want to receive it the same way next time. 2: I am generally satisfied and want to receive it the same way next time. 3: I neither agree nor disagree; 4: It was painful; thus, I want to receive it another way next time.