Prospective Study
Copyright ©The Author(s) 2015.
World J Gastroenterol. Mar 14, 2015; 21(10): 3030-3034
Published online Mar 14, 2015. doi: 10.3748/wjg.v21.i10.3030
Table 1 Demographic features of cases
Age, yr (mean/range)49 ± 12 (28-70)
Sex, n (female/male)23/23
BMI, kg/m2 (mean age, range)
< 3027.7 ± 1.7 (25-29)
> 3033.5 ± 3.3 (30.5-45.5)
Comorbidity37.0%
Smoking23.9%
Endoscopic esophagitis46.0%
Impedance results, n (%)
Normal14 (30.4)
Pathologic acid reflux16 (34.8)
Weakly acid reflux15 (32.6)
Weakly alkaline reflux1 (2.2)
Table 2 Impedance results of overweight and obese patients
Impedance results, nBMI > 30 kg/m2 (n = 23)BMI < 30 kg/m2 (n = 23)P value
Total gas reflux25.8 ± 34.7 (0-157)18.5 ± 13.3 (0-52)0.87
Upright gas reflux20 ± 20 (0-88)16.9 ± 13 (0-52)0.82
Acid reflux episodes26 ± 54 (0-268)26 ± 24 (1-77)0.87
Weakly acid reflux episodes28 ± 31 (3-143)22 ± 20 (4-105)0.82
Time of pH < 43.6% ± 7.4% (0%-35%)3.7% ± 5.5% (0%-22%)0.99
Longest episodes of acid reflux6 ± 7.5 (0.14-25)11.7 ± 21 (0-90)0.88
DeMeester score15.7 ± 27.9 (0.2-124)15.3 ± 21.09 (0.2-91)0.97
Pathologic acid reflux, n (%)7 (30.4)9 (39.1)0.70
Weakly acid reflux, n (%)9 (39.1)6 (26.1)0.70
Weakly alkaline reflux, n (%)-1 (4.3)
Normal impedance findings, n (%)7 (30.4)7 (30.4)0.70