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