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Best predictors for H. pylori infection.
| Window | Absorption band (cm−1) | χ2-square test value | p-value | Teoretical chemical bond |
|---|---|---|---|---|
| W3 | 1425 | 66.67 | 3.30E−16 | C=O stretching |
| 1354 | 62.44 | 2.80E−15 | C–N stretching | |
| 1353 | 62.44 | 2.80E−15 | C–H bending | |
| 1424 | 61.21 | 5.10E−15 | C=O stretching | |
| 1355 | 59.40 | 1.30E−14 | C–H bending |
