Fig. 1.

Change in phospho/sphingolipids by time and surgery.

Change in the geometric mean of each lipid between baseline and month 1 (A) and month 3 (B). Unfilled circles reflect lipids that changed regardless of surgery type (main effect of time) and filled circles are lipids that had a surgery-type by time interaction (2-way ANOVA; false discovery rate <5% main-effect and <10% interaction). Axes are on the log-2 scale i.e. −1 = 50% decrease. Band = Gastric banding, RYGB = Roux-en-Y Gastric Bypass, LP = Lysophospho-choline and –ethanolamine, PA=Phosphatidic acid, PC = Phosphatidylcholine, PE = Phosphatidylethanolamine, PG = Phosphatidylglycerol, PI = Phosphatidylinositol, PS = Phosphatidylserine, SM = Sphingomyelin, Ce = Ceramides and dihydroceramides.