BACKGROUND: Obesity is a risk factor for GERD and a potential modulator of esophageal motility. AIM: To assess whether obese patients differ from non-obese patients in terms of esophageal motility and reflux. METHODS: Patients (n = 332) were categorized in GERD and controls after clinical assessment, esophageal manometry, and pH monitoring. Non-obese (BMI 16-29.9) and obese (BMI 30-68) were compared in regard of distal esophageal amplitude (DEA), LES pressure (LESP), manometric diagnosis, and esophageal acid exposure (EAE). RESULTS: Obese showed higher DEA in both controls (122 ± 53 vs. 97 ± 36 mmHg, p = 0.041) and GERD patients (109 ± 38 vs. 94 ± 46 mmHg, p < 0.001), higher LESP in GERD patients (20.5 ± 10.6 vs. 18.2 ± 10.6 mmHg, p = 0.049), higher frequency of nutcracker esophagus in controls (30 vs. 0%, p = 0.001), lower frequency of ineffective motility in GERD patients (6 vs. 20%, p = 0.001), and higher EAE in both controls [total EAE: 1.6% (0.7-5.1) vs. 0.9% (0.2-2.4), p = 0.027] and GERD patients [upright EAE: 6.5% (3.8-11.1) vs. 5.2% (1.5-10.6), p = 0.048]. Multiple linear regression showed that BMI was associated either with EAE (p < 0.001), DEA (p = 0.006), or LESP (in men, p = 0.007). CONCLUSIONS: Obese patients differed from non-obese in terms of esophageal motility and reflux, regardless of the presence of GERD. Obese patients showed stronger peristalsis and increased acid exposure in the esophagus.
BACKGROUND: Obesity is a risk factor for GERD and a potential modulator of esophageal motility. AIM: To assess whether obesepatients differ from non-obesepatients in terms of esophageal motility and reflux. METHODS:Patients (n = 332) were categorized in GERD and controls after clinical assessment, esophageal manometry, and pH monitoring. Non-obese (BMI 16-29.9) and obese (BMI 30-68) were compared in regard of distal esophageal amplitude (DEA), LES pressure (LESP), manometric diagnosis, and esophageal acid exposure (EAE). RESULTS:Obese showed higher DEA in both controls (122 ± 53 vs. 97 ± 36 mmHg, p = 0.041) and GERDpatients (109 ± 38 vs. 94 ± 46 mmHg, p < 0.001), higher LESP in GERDpatients (20.5 ± 10.6 vs. 18.2 ± 10.6 mmHg, p = 0.049), higher frequency of nutcracker esophagus in controls (30 vs. 0%, p = 0.001), lower frequency of ineffective motility in GERDpatients (6 vs. 20%, p = 0.001), and higher EAE in both controls [total EAE: 1.6% (0.7-5.1) vs. 0.9% (0.2-2.4), p = 0.027] and GERDpatients [upright EAE: 6.5% (3.8-11.1) vs. 5.2% (1.5-10.6), p = 0.048]. Multiple linear regression showed that BMI was associated either with EAE (p < 0.001), DEA (p = 0.006), or LESP (in men, p = 0.007). CONCLUSIONS:Obesepatients differed from non-obese in terms of esophageal motility and reflux, regardless of the presence of GERD. Obesepatients showed stronger peristalsis and increased acid exposure in the esophagus.
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