Changes in antibody levels: First sample compared to sample with maximal change in sum of quartiles.

gASCA: anti-Saccharomyces cerevisiae antibodies, ACCA: anti-chitobioside carbohydrate IgA antibodies, ALCA: anti-laminaribioside carbohydrate IgG antibodies, AMCA: anti-mannobioside carbohydrate IgG antibodies, Anti-L: anti-laminarin carbohydrate antibody, Anti-C: anti-chitin carbohydrate antibody. CD: Crohn's disease; UC: Ulcerative colitis; EU: ELISA units; P25, P75: 25th and 75th percentiles.