Table 1.
Patient characteristics at the preoperative visit and the 2 year follow-up visit after Roux-en-Y-gastric bypass
| Preoperative visit n = 233 |
Two year follow-up visit n = 233 |
Statistics (p-values) |
|
|---|---|---|---|
| Gender (male/female) | 56 (24%)/177 (76%) | ||
| Age (years) | 43.5 (9.1) | ||
| Body mass index (kg/m2) | 42.9 (4.9) | 29.5 (4.6) | <0.001 |
| Living with partner | 161 (71%) | 172 (76%) | 0.03 |
| Full time work | 130 (58%) | 127 (56%) | 0.78 |
| Type 2 diabetes | 55 (24%) | 18 (8%) | <0.001 |
| Hypertension | 98 (43%) | 34 (15%) | <0.001 |
| Hypothyroidism | 22 (10%) | 24 (10%) | 0.73 |
| Fibromyalgia | 33 (14%) | 36 (16%) | 0.61 |
| Self-reported psychiatric disorder | 40 (17%) | 37 (16%) | 0.76 |
| Irritable bowel syndrome | 27 (12%) | 61 (26%) | <0.001 |
| IBS-constipation | 5 (2%) | 11 (5%) | 0.15 |
| IBS-diarrhea | 5 (2%) | 12 (5%) | 0.09 |
| IBS-mixed | 16 (7%) | 34 (15%) | 0.004 |
| IBS-unsubtyped | 1 (0.4%) | 3 (1%) | 0.63 |
| Hemoglobin (g/dl) | 14.2 (1.1) | 13.7 (1.1) | <0.001 |
| Iron (mol/L) | 15.1 (5.2) | 19.6 (6.9) | <0.001 |
| Ferritin | 104.5 (8–584) | 115.0 (4–804) | 0.31 |
| White-cell count (×109/liter) | 7.7 (2.1) | 6.2 (1.9) | <0.001 |
| HbA1c (%) | 5.7 (4.6–14.9) | 5.2 (4.0–9.7) | <0.001 |
| C-reactive protein (mg/liter) | 7.0 (0–50.0) | 0.6 (0–66.0) | <0.001 |
| Cholesterol (mmol/liter) | 4.9 (1.0) | 4.3 (0.7) | <0.001 |
| High-density lipoprotein (mmol/liter) | 1.2 (0.3) | 1.7 (0.4) | <0.001 |
| Low-density lipoprotein (mmol/liter) | 3.2 (0.9) | 2.5 (0.7) | <0.001 |
| Triglycerides | 1.9 (1.3) | 1.0 (0.5) | <0.001 |
| Vitamin B1 (nmol/liter) | 157.4 (27.8) | 159.6 (27.7) | 0.18 |
| Vitamin B6 (nmol/liter) | 36.5 (34.9) | 52.8 (44.0) | <0.001 |
| Vitamin B12 (pmol/liter) | 375.8 (166.8) | 531.4 (321.3) | <0.001 |
| Folic acid (nmol/liter) | 20.3 (9.0) | 22.2 (10.6) | 0.014 |
The results are given as number (proportion in per cent) for categorical variables, mean (SD) for continuous variables with normal distribution and median (min-max) for other variables. Significant p-values are marked in bold
Data were analyzed with McNemar test for categorical variables and paired t-tests or Wilcoxon signed-rank test (marked with†) for continuous variables
For one patient, we had insufficient information for subtyping of IBS at the 2 year follow-up visit
Missing variables: Living with partner (n = 7), Full time work (n = 7), type 2 diabetes (n = 3), Hypertension (n = 4) Hypothyroidism (n = 4), Fibromyalgia (n = 4), minor psychiatric disorder (n = 4), Hemoglobin (=2), Iron (n = 2), Ferritin (n = 7), White-cell count (n = 3), HbA1c (n = 2), CRP (n = 3), Cholesterol (n = 2), High-density lipoprotein (n = 2), Low-density lipoprotein (n = 2), Triglycerides (n = 2), Vitamin B1 (n = 4), Vitamin B6 (n = 4), Vitamin B12 (n = 2), Folic acid (n = 2)
*Two de-novo diabetes mellitus