Detailed analysis of LOS components in hiatus hernia versus controls showing positions of the upper border LOS, pH transition point, SCJ and first pressure peak
| Hiatus hernia | Controls | p Value | |
|---|---|---|---|
| Nares to upper border LOS (cm) (IQR) | |||
| FU | 44.5 (2.0) | 44.5 (5.0) | 0.92 |
| FS | 44.5 (3.0) | 45.5 (4.0) | 0.138 |
| PPU | 43.0 (3.5) | 43.25 (5.63) | 0.783 |
| PPS | 44.0 (3.5) | 44.0 (3.0) | 0.365 |
| Upper border LOS to pH transition point (cm) (IQR) | |||
| FU | 2.4 (4.0) | 3.15 (1.42) | 0.245 |
| FS | 0.50 (4.2) | 2.35 (3.08) | 0.048 |
| PPU | 1.1 (3.0) | 2.55 (4.73) | 0.022 |
| PPS | −0.5 (4.2) | 2.30 (4.18) | 0.008 |
| Upper border LOS to SCJ (cm) (IQR) | |||
| FU | 2.46 (2.33) | 2.94 (1.31) | 0.046 |
| FS | 2.13 (1.89) | 3.22 (1.69) | 0.055 |
| PPU | 2.21 (2.24) | 3.10 (1.26) | 0.033 |
| PPS | 1.23 (2.07) | 2.53 (1.57) | 0.019 |
| SCJ to pH transition point (cm) (IQR) | |||
| FU | 0.54 (2.13) | −0.18 (2.47) | 0.530 |
| FS | 0.22 (3.24) | 0.15 (1.90) | 0.638 |
| PPU | −0.56 (2.77) | −0.64 (5.44) | 0.249 |
| PPS | −0.31 (3.47) | 0.54 (4.28) | 0.033 |
| Proximal pressure peak to pH transition point (cm) (IQR) | |||
| FU | 0.40 (3.70) | 0.90 (2.53) | 0.217 |
| FS | −1.3 (5.18) | 0.20 (3.15) | 0.134 |
| PPU | −0.60 (2.72) | 0.55 (4.48) | 0.039 |
| PPS | −2.4 (4.03) | 0.7 (4.35) | 0.002 |
FS, fasting supine; FU, fasting upright; LOS, lower oesophageal sphincter; PPS, postprandial supine; PPU, postprandial upright; SCJ, squamocolumnar junction.