Summary of shifts (>32%) in the relative proportions of Firmicutes and Bacteroidetes for subjects with dissimilar samples, and all shifts observed for subjects who did not undergo colonoscopy.

*Abbreviations for indications for colonoscopy: UC, ulcerative colitis, AP, abdominal pain, FHCRC, family history of colorectal cancer, PP, previous polyps, N/A, did not undergo colonoscopy; indication not applicable.**Sample most dissimilar to other sample(s) from the same subject.***Values showing shifts (%) in Firmicutes and Bacteroidetes phyla for samples obtained from the same patient at different time points, ↑, increase in Firmicutes relative to the first sample, ↓, decrease in Firmicutes relative to the first sample for each comparison. For subjects who underwent colonoscopy: −1m, −1w, sample obtained one month, one week pre-colonoscopy, and LS refers to the last sample obtained post-colonoscopy (refer to Table 3), respectively. For subjects who did not undergo colonoscopy: +3m, sample obtained 3–6 months after the first sample.