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Table 4 Gastrointestinal symptoms and food tolerance before and 6 months after the surgery in the two surgery groups

From: Changes in gastrointestinal symptoms and food tolerance 6 months following weight loss surgery: associations with dietary changes, weight loss and the surgical procedure

  Pre-surgery 6 months post-surgery
RYGB VSG RYGB VSG
GSRS-IBS-Pain (1–7) 1.50 (1.00 to 2.50) 1.00 (1.00 to 2.00) 2.00 (1.00 to 2.50) 2.50 (1.00 to 3.00) c*
GSRS-IBS-Satiety (1–7) 1.00 (1.00 to 1.50) 1.00 (1.00 to 1.00) 2.00 (1.50 to 3.00) 3.00 (2.50 to 4.00) a*, b*, c*, d*
GSRS-IBS-Bloating (1–7) 2.00 (1.25 to 3.08) 1.67 (1.00 to 2.33) 2.33 (1.67 to 3.33) 1.67 (1.33 to 3.00)
GSRS-IBS-Constipation (1–7) 1.00 (1.00 to 2.00) 1.00 (1.00 to 1.00) 1.00 (1.00 to 2.50) 1.00 (1.00 to 3.50) c*
GSRS-IBS-Diarrhea (1–7) 1.25 (1.00 to 2.00) 1.00 (1.00 to 1.50) a* 1.75 (1.25 to 2.25) 1.25 (1.00 to 1.75)
FTS (1–27) 24.0 (22.0 to 26.0) 25.5 (23.0 to 27.0) 23.0 (20.0 to 26.0) 20.0 (19.0 to 24.2) c*
  1. Data are given as median (25–75 percentiles). Mann-Whitney U-test (between group comparisons); Wilcoxon Signed Rank Test (within group comparison of changes). * Statistically significant p < 0.05: a RYGB vs. VSG; b Changes pre-to post-surgery within group (RYGB); c Changes pre-to post-surgery within group (VSG); d between-group comparisons (RYGB vs. VSG) of the changes pre-to post-surgery. GSRS-IBS: Gastrointestinal Symptom Rating Scale-Irritable Bowel Syndrome (range 1–7: Increasing values indicates increasing symptoms). FTS: Food Tolerance Score (range 1–27: Increasing values indicates better tolerance)