Gastroenterology Research and Practice / 2015 / Article / Tab 1 / Clinical Study
Comparisons of Esophageal Function Tests between Chinese and British Patients with Gastroesophageal Reflux Disease Table 1 Demographic data and high-resolution manometry and impedance results and 24-hour multichannel intraluminal impedance and pH recording of different groups.
Items British Chinese Independent-sample -test or chi-square Age (mean ± SD, yr) 48.8 ± 13.4 53.5 ± 11.8 Male/Female, 28/31 39/43 BMI 24.6 ± 1.9 25.1 ± 2.1 LESP (mean ± SD, mmHg) 16.0 ± 8.6 16.5 ± 10.0 LESL (mean ± SD, cm) 3.1 ± 0.3 2.9 ± 0.5 LESRP (mean ± SD, mmHg) 2.6 ± 5.0 4.4 ± 4.7 IRP (mean ± SD, mmHg) 4.1 ± 4.6 9.0 ± 5.9 P < 0.001 UESP (mean ± SD, mmHg) 50.0 ± 30.8 75.0 ± 25.6 P < 0.001 DEA (mean ± SD, mmHg) 55.7 ± 30.2 58.9 ± 31.9 DCI (mean ± SD, mmHg⋅cm⋅s) 533.0 ± 540.1 535.8 ± 556.6 Peristalsis normal/small break/large break 24/12/23 44/10/28 Total bolus transit time (s) 7.3 ± 1.3 7.6 ± 1.2 Complete bolus transit rate (%) 66.7 ± 37.8 61.7 ± 36.4 Hiatus hernia (%) 6 (10.1) 9 (10.9) Demeester 24.4 ± 24.2 15.0 ± 12.8 Acid exposure upright (%) 7.6 ± 7.8 5.0 ± 5.5 Acid exposure recumbent (%) 6.6 ± 11.1 3.3 ± 5.0 Acid exposure total (%) 6.6 ± 7.0 4.1 ± 4.2 Bolus exposure upright (%) 5.4 ± 4.6 3.7 ± 0.5 Bolus exposure recumbent (%) 1.6 ± 3.2 1.2 ± 2.1 Bolus exposure total (%) 3.7 ± 3.6 2.5 ± 2.1 Proximal acid ( ) 30.3 ± 19.2 13.0 ± 9.4 P < 0.001 Proximal nonacid ( ) 17.2 ± 15.1 14.5 ± 12.7 Proximal total ( ) 47.2 ± 23.5 27.4 ± 16.1 P < 0.001 Acid reflux ( ) 40.1 ± 23.1 20.9 ± 12.8 P < 0.001 Nonacid reflux ( ) 34.0 ± 34.7 22.7 ± 15.8 Total reflux ( ) 74.8 ± 42.8 43.6 ± 24.0 P < 0.001
BMI: body mass index; LESP: lower esophageal sphincter pressure; LESL: length of lower esophageal sphincter; LESRP: lower esophageal sphincter residual pressure; IRP: integrated relaxation pressure; UESP: upper esophageal sphincter pressure; DEA: distal esophageal amplitude; DCI distal contractile integral.