Table 4.
Comparison between upper gastrointestinal endoscopy and RDQ (Wilcoxon rank-sum test)
| RDQ |
Endoscopy |
Total | U value | P value | ||||
| Negative | A | B | C | D | ||||
| Negative | 1530 | 131 | 34 | 5 | 3 | 1703 | ||
| Positive | 237 | 202 | 68 | 15 | 6 | 528 | 3.60 | 0.000 |
| Total | 1767 | 333 | 102 | 20 | 9 | 2231 | ||
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