Table 2.
Ultrasound-measured antral area and gastric volume by the gastric antral grades
| Gastric cancer | Colon cancer | P value | |
|---|---|---|---|
| Grade 0 | n = 92 | n = 130 | |
| CSA in supine, cm2 | 2.7 (2.0, 3.4) | 2.9 (2.4, 3.7) | 0.067 |
| CSA in RLD, cm2 | 4.1 (3.3, 5.3) | 4.2 (3.6, 5.1) | 0.980 |
| Predicted volume, mLa | 16.4 (0, 42.1) | 11.9 (0, 29.1) | 0.088 |
| Predicted volume, mL/kg | 0.3 (0, 0.7) | 0.2 (0, 0.4) | 0.084 |
| Grade 1 | n = 138 | n = 159 | |
| CSA in supine, cm2 | 3.4 (2.6, 4.8) | 3.7 (3.0, 4.6) | 0.312 |
| CSA in RLD, cm2 | 7.5 (5.7, 9.2) | 7.1 (6.1, 8.6) | 0.594 |
| Predicted volume, mLa | 55.6 (32.6, 83.1) | 48.3 (31.4, 75.8) | 0.216 |
| Predicted volume, mL/kg | 0.9 (0.5, 1.3) | 0.8 (0.5, 1.1) | 0.197 |
| Grade 2 | n = 70 | n = 11 | |
| CSA in supine, cm2 | 6.3 (4.6, 8.9) | 5.3 (4.3, 6.5) | 0.247 |
| CSA in RLD, cm2 | 10.5 (7.8, 14.5) | 9.4 (8.1, 12.2) | 0.370 |
| Predicted volume, mLa | 106.5 (59.5, 166.6) | 85.7 (76.9, 118.8) | 0.385 |
| Predicted volume, mL/kg | 1.7 (0.9, 2.6) | 1.3 (1.1, 1.9) | 0.356 |
The data are expressed as median (interquartile range)
CSA antral cross-sectional area, RLD right lateral decubitus position
aPredicted volumes (mL) based on a mathematical model previously validated