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Operation types and critical toxicity of reflux juice in each histological grade
| Histological grades | Billroth I | Billroth II | Critical toxic concentrations (%, v:v) | Correlation between histological grades and toxicitya |
| 1 Chronic superficial gastritis | 7 | 10 | 16.4 ± 4.0 | |
| 2 Atrophic gastritis/intestinal metaplasia | 4 | 7 | 15.8 ± 5.0 | |
| 3 Dysplasia | 2 | 7 | 12.9 ± 4.6 | rs = -0.287，P = 0.085 |
Two tailed spearman's rank correlation.
