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Table 1 Demographic data and high-resolution manometry and impedance results

From: Comparison of oesophageal function tests between Chinese non-erosive reflux disease and reflux hypersensitivity patients

Items NERD RH Independent-sample t-test or χ 2 test
n = 111 n = 92
Age (mean ± SD, years) 58.8 ± 10.4 51.1 ± 12.8 P < 0.001
Male/Female, n 51/60 44/48 P = 0.789
LESP (mean ± SD, mmHg) 15.3 ± 8.9 19.3 ± 23.3 P = 0.122
LESL (mean ± SD, cm) 3.9 ± 1.6 3.7 ± 0.7 P = 0.343
LESRP (mean ± SD, mmHg) 4.3 ± 4.0 4.6 ± 4.3 P = 0.564
IRP (mean ± SD, mmHg) 7.5 ± 4.8 7.9 ± 5.2 P = 0.485
UESP (mean ± SD, mmHg) 73.2 ± 29.6 82.1 ± 35.9 P = 0.054
DEA (mean ± SD, mmHg) 65.5 ± 36.7 64.0 ± 32.9 P = 0.756
DCI (mean ± SD, mmHg∙s∙cm) 751.9 ± 856.2 661.9 ± 961.7 P = 0.482
Ineffective oesophageal motility n (%) 55(49.5) 38(41.3) P = 0.241
Fragmented peristalsis % 6(5.4) 9(9.8) P = 0.235
Total bolus transit time (s) 6.3 ± 1.3 6.5 ± 1.3 P = 0.119
Complete bolus transit rate (%) 76.1 ± 33.0 73.1 ± 32.0 P = 0.224
Hiatus hernia n(%) 10(9.0) 8(8.6) P = 0.938
  1. NERD non-erosive reflux disease, RH reflux hypersensitivity, LESP lower oesophageal sphincter pressure, LESL length of lower oesophageal sphincter, LESRP lower oesophageal sphincter residual pressure, IRP integrated relaxation pressure, UESP upper oesophageal sphincter pressure, DEA distal oesophageal amplitude, DCI distal contractile integral, SD standard deviation