Table 4.
Agreement between the test variables with the best cut-off values.
| Variables | H2 +CH4x2 <18 ppm | H2 + CH4 <17 ppm | H2 < 16 ppm | s-glucose > 0.9 mmol/L |
|---|---|---|---|---|
| H2 + CH4 < 17 ppm | 0.91 (p < 0.001) | ----- | ----- | ----- |
| H2 < 16 ppm | 0.81 (p < 0.001) | 0.90 (p < 0.001) | ----- | ----- |
| s-glucose > 0.9 mmol/L | 0.44 (p = 0.001) | 0.50 (p < 0.001) | 0.46 (p = 0.001) | ----- |
| Any symptom-ELL | 0.38 (p = 0.002) | 0.43 (p < 0.001) | 0.41 (p < 0.001) | 0.25 (p = 0.032) |
The results are given as kappa values with statistics (p-values) in brackets.