passages.id: split_5_test_64_passage
passages.type: progene_text
passages.text: Basal midexpiratory lower esophageal sphincter pressure was similar in the study group ( mean [ SD ] 20.1 [ 9.1 ] mmHg ) and controls ( 17.6 [ 6.0 ] mmHg ) ; the pressure did not change following EVS or EVL .