Principal-coordinate analysis and nonmetric multidimensional scaling profile of gut microbial diversity. The principal-coordinate analysis and nonmetric multidimensional scaling profile were based on the Bray-Curtis distance, Jaccard, and unweighted and weighted UniFrac metrics. They showed that the gut microbial community differs in rats with and without prednisone therapy. Abbreviations: PCoA, principal-coordinate analysis; NMDS, nonmetric multidimensional scaling; Bray, Bray-Curtis distance; unifrac, unweighted UniFrac metric; wunifrac, weighted UniFrac metric.