Effect of the patient identification number (PID) on the dissimilarity indices
| Dissimilarity index | Bray–Curtis | Jaccard | Unweighted UniFrac | Weighted UniFrac |
| Test statistic | 1.71 | 1.54 | 2.15 | 1.42 |
| P value | 0.004 | 0.003 | <0.001 | 0.106 |
Test=pseudo-F; sample size=16; No of groups=8; No of permutations=999.