Table 2.
Differences in participants by methane production status
| High methane producer (28) | Low methane producer (78) | Significance | |
|---|---|---|---|
| Age (years) | 43.7 ± 16.8 | 42.0 ± 16.1 | 0.68 |
| Gender, n (%) | |||
| Female | 17 (61) | 62 (79) | |
| Male | 11 (39) | 16 (21) | 0.05 |
| Proportion with a significant rise in hydrogen in 90 min, n (%) | |||
| Yes | 17 (61) | 64 (82) | |
| No | 11 (39) | 14 (18) | <0.05 |
| Time to a rise in H2 (minutes) | 60 | 65 | 0.84 |
| 95% confidence interval | 50–90 | 60–80 | |
| Amount of H2 produced (area under the curve: ppm min) | 1528 | 2375 | 0.11 |
| 960–3645 | 1810–3195 |
Breath hydrogen and breath methane levels were measured by gas chromatography on a GastroCH4ECK (Bedfont Scientific Ltd., Kent, UK). Mann–Whitney U‐tests were used to test for statistical significance.