Fig 6.

Mean % DNA probe counts of the 40 test species in supragingival biofilm samples for teeth subset according to intra-oral location and according to the quartiles of the total DNA probe counts. The proportion of each species was computed at each sample site, averaged within a tooth type category for each total DNA probe count quartile and then averaged across subjects. Significance of differences among total DNA probe count quartile groups for each tooth type category for each of the test species was determined using the Kruskal Wallis test and adjusted for 40 comparisons: * p < 0.05; ** p < 0.01; *** p < 0.001. The species were ordered according to supragingival microbial complexes (1).