Table 2. PERMANOVA 1 analysis of personal factors with the unweighted UniFrac distance matrix.
| Factor | F statistic | P-value |
|---|---|---|
| Main Analysis | ||
| Sex | 1.49 | 0.001 |
| BMI 2 | 1.12 | 0.05 |
| Total Fiber 3 | 1.08 | 0.14 |
| Fruit & Vegetable Fiber 3 | 1.13 | 0.06 |
| Bean Fiber 3 | 1.13 | 0.06 |
| Grain Fiber 3 | 1.08 | 0.15 |
| Men | ||
| BMI 2 | 1.04 | 0.29 |
| Total Fiber 3 | 1.01 | 0.41 |
| Fruit & Vegetable Fiber 3 | 1.08 | 0.10 |
| Bean Fiber 3 | 1.17 | 0.01 |
| Grain Fiber 3 | 0.99 | 0.48 |
| Women | ||
| BMI 2 | 1.17 | 0.03 |
| Total Fiber 3 | 1.26 | 0.005 |
| Fruit & Vegetable Fiber 3 | 1.13 | 0.05 |
| Bean Fiber 3 | 0.97 | 0.64 |
| Grain Fiber 3 | 1.19 | 0.01 |
1Adonis, which uses permutational multivariate analysis of variance (PERMANOVA), was used to test statistical significances of association of overall composition with personal factors. All analyses were carried out using the QIIME pipeline.
2BMI was categorized as normal weight (<25 kg/m2) versus overweight or obese (≥25 kg/m2).
3Total and specific sources of dietary fiber were categorized as low (quartiles 1–3) versus high (quartile 4) intake.