Thirty morbidly obese patients presenting forbariatric surgery were evaluated for symptomatic andobjective evidence of gastroesophageal reflux. Sixteenpatients had heartburn while 14 were asymptomatic. All underwent esophageal function testing;manometry was performed in all patients, pH monitoringin 28. Patients with esophageal pH < 4="" for="" more="" than5%="" of="" observed="" time="" weighed="" more="" than="" those="" with="" normal="" acid="" exposure,="" 165.2="" vs="" 129.8="" kg="" (p=""><0.01), and="" had="" significantly="" higher="" body="" mass="" indices,56.5="" vs="" 48.3="">² (P < 0.05).="" similarly,morbidly="" obese="" patients="" with="" abnormal="" reflux="" scores="" weighed="" significantly="" more="" and="" hadgreater="" body="" mass="" indices="" than="" patients="" with="" normalscores="" (p="">< 0.05).="" lower="" esophageal="" sphincterpressure="" was="" higher="" in="" patients="" with="" normal="" esophagealacid="" exposure="" than="" in="" those="" with="" abnormal="" findings,15.5="" vs="" 12.5="" mm="" hg="" (p="">< 0.05).="" this="" studydemonstrates="" a="" correlation="" between="" both="" weight="" and="" bodymass="" index="" with="" gastroesophageal="">