TABLE 3.
Colonic hydrogen profiles across the dietary intervention periods, including overall and regional hydrogen concentrations (% of gas detected in the lumen), and peak hydrogen concentration metrics.
| Control | Sugarcane | Combination | |
|---|---|---|---|
| Hydrogen concentration (% of gas detected within the lumen) | |||
| Overall | 1.7 (0.9–2.4) | 1.5 (0.3–2.6) | 2.7 (1.5–3.9) |
| Quartile 1 | 3.0 (1.1–4.2) | 2.6 (0.2–4.9) | 2.4 (1.2–3.6) |
| Quartile 2 | 3.5 (1.3–5.7) | 3.0 (0.3–5.7) | 4.0 (1.5–6.5) |
| Quartile 3 | 2.9 (0.9–4.8)a | 2.2 (0.4–4.0)b | 4.7 (2.3–7.1)a, b |
| Quartile 4 | 1.9 (0.7–3.1)a | 1.8 (0.8–2.8)b | 4.9 (2.2–7.5)a, b |
| Hydrogen peak metrics | |||
| Peak concentration (%) | 5.4 (3.3–7.5) | 5.3 (1.3–9.4) | 7.3 (4.4–10.3) |
| Time to peak (from ileocaecal valve; hours) | 4.2 (2.8–7.2) | 6.5 (3.5–9.1) | 11.4 (6.7–32.1) |
| Time to peak (% of colonic transit time) | 18.5 (11.4–36.7)a | 22.4 (14.2–71.4) | 70.4 (54.1–93.7)a |
Note: Data shown as mean (95% CIs) for hydrogen concentrations, median (IQR) for time to peak hydrogen, and analysed via linear mixed models. Significant differences (p ≤ 0.05) between the dietary interventions shown via shared superscripts.