Bar graphs of the pre- and postoperative values for (A) HOMA-IR, (B) HOMA-B, and AUCs (C) for glucose, (D) insulin, (E) C-peptide and (F) proinsulin with respect to deteriorated, stable and improved blood glucose homeostasis.

(Points: means; error bars: 95% CI; black error bars: preoperative values; broken error bars: postoperative values for each group; reference lines: cut-off/normal values; F- and p-values beneath each diagram: one-sided ANOVA for comparison between the three groups at each time point; and p-values within the diagram: two-sided T-test for paired samples for pre- and postoperative comparisons within the designated group).