Boxplots of microbiome alpha diversity, as measured by the Shannon diversity index, across BOR categories (cPD n = 21, PD n = 30, SD n = 29, PR n = 22, CR n = 4). Boxplot center line indicates the median; box limits indicate the upper and lower quartiles; and whiskers indicate 1.5x the interquartile range. The linear model (line of best fit) for the Shannon diversity index and BOR (with shaded 95% confidence interval) is superimposed (in gray). Kendall τ and P values for the association between the Shannon diversity index and BOR are indicated.
