Table 3.
Preoperative Manometric Lower Esophageal Sphincter Characteristics and Gas-Bloat Syndrome
| Variable | GBS, N = 65 (13.3%) | No GBS, N = 424 (86.7%) | p Value |
|---|---|---|---|
| LES total length, cm, median (IQR) | 2.7 (2–4) | 2.9 (2–4) | 0.342 |
| LES total length <2.7 cm, % | 20.9 | 37.8 | 0.209 |
| LES abdominal length, cm, median (IQR) | 0.8 (0–2) | 1.1 (0–2) | 0.850 |
| LES abdominal length <1.7 cm, % | 68.2 | 64.1 | 0.573 |
| LES resting pressure, cm, median (IQR) | 21.9 (13–33) | 20.6 (13–31) | 0.795 |
| LES resting pressure <13 mmHg, % | 25.4 | 24.6 | 0.876 |
| Integrated relaxation pressure, median (IQR) | 7.4 (4–11) | 6.0 (2–10) | 0.434 |
| Structurally competent LES*, % | 23.1 | 30.4 | 0.246 |
*
Defined as sphincter with total length ≥2.7 cm, abdominal length ≥1.7 cm, and resting pressure ≥13 mmHg.
GBS, gas-bloat syndrome; IQR, interquartile range; LES, lower esophageal sphincter.