Comparisons of Esophageal Function Tests between Chinese and British Patients with Gastroesophageal Reflux Disease

Table 4

Results of stepwise linear regression analysis of different demographic data on items of HRiM in Chinese healthy volunteers and GERD patients.

HRiM items	Unstandardized coefficients ()
	Constant	Age	Gender	Group	square
LESP	36.213	—	—	−9.824	0.181
LESL	—	—	—	—	—
LESRP	8.962	—	—	−2.275	0.054
IRP	—	—	—	—	—
UESP	130.787	—	—	−1.002	0.157
DEA	131.731	—	—	−36.408	0.227
DCI	3840.796	−13.082	−438.073	−1668.335	0.431
Peristalsis	0.060	—	0.255	0.678	0.177
TBTT	6.694	—	—	0.662	0.080
CRTR	93.454	—	—	−15.873	0.063

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; TBTT: total bolus transit time; CBTR: complete bolus transit rate. Only data with were expressed as values of beta-coefficients. “—”: .