Fig. 4

Principal component analysis (PCA) scores plot of urine metabolic profiles of 11 subjects, with samples at baseline, 3 days post procedure, and 6 weeks post procedure. Samples from the same subject are plotted in the same colour, with participant number as shown in the key; sampling time points are also shown for each participant, i.e. baseline (t0), 3 days after bowel preparation (t1), and 6 weeks after bowel preparation (t2). This figure shows intra-subject clustering in samples from 9 out of 10 subjects over the 3 time points