χ2 analyses for H. pylori and each duodenal biopsy result. The table shows no association between H. pylori and any of the duodenal biopsy results
| Duodenal biopsy result | Pearson χ2 value | df | Asymptotic significance (two-sided) | Comment |
| Villous atrophy | 0.978 | 1 | 0.323 | The percentage of patients that had villous atrophy did not differ by H. pylori result X2(1, n=1428)=0.978, p=0.323. |
| Intraepithelial lymphocytes | 0.357 | 1 | 0.550 | The percentage of patients that had Intraepithelial lymphocytes did not differ by H. pylori result X2(1, n=1428)=0.357, p=0.550. |
| Villous atrophy and intraepithelial lymphocytes | 0.585 | 1 | 0.445 | The percentage of patients that had both villous atrophy and Intraepithelial lymphocytes did not differ by H. pylori result X2(1, n=1428)=0.585, p=0.445. |
| Duodenal carcinoma | – | – | 0.303 (Fisher’s exact test) | The percentage of patients that had Duodenal Carcinoma did not differ by H. pylori result (p=0.303). |
| Valid cases (N) | 1428 | |||