Similarity of Percentages (SIMPER) analysis of bacterial community similarity (Bray-Curtis index) between patients.

Given is occupancy, or number of patients a given species was detected in. Mean % abundance of species across the samples it was observed to occupy. Mean contribution represents the average contribution of a given species to the average similarity between samples (overall mean = 13.6%). Percentage contribution is the mean contribution divided by mean similarity across samples. The list of species is not exhaustive so cumulative % value does not sum to 100%. An arbitrary threshold of a mean contribution of 0.5 was used as a cut-off.