Table 3.
Pre- and post-operative micronutrient values and deficiencies after revisional SADI-S and RYGB
| SADI-S | RYGB | |||||||
|---|---|---|---|---|---|---|---|---|
| Critical range | Pre-op deficient | Post-op deficient | Post-op (N) | Pre-op deficient | Post-op deficient | Post-op (N) | P-value | |
| Hemoglobin (mmol/l) |
M: <8.5 F: <7.5a |
7 (11.3%) | 24 (38.7%) | 62 | 12 (17.9%) | 17 (23.9%) | 71 | .099 |
| Calcium* (mmol/l) | <2.15b | 2 (5.9%) | 14 (23.3%) | 60 | 2 (6.5%) | 9 (13.0%) | 69 | .123 |
| Phosphorus (mmol/l) | <0.9a | 2 (16.7%) | 3 (14.3%) | 21 | 2 (15.4%) | 1 (4.8%) | 21 | .290 |
| Iron (μmol/l) | <8.95b | 2 (13.3%) | 9 (30.0%) | 30 | 4 (20.0%) | 6 (17.1%) | 35 | .260 |
| Ferritin (μg/l) | <20b | 6 (12.2%) | 16 (27.1%) | 59 | 6 (16.2%) | 22 (33.3%) | 66 | .467 |
| Albumin (g/l) | <35a | 0 (0%) | 10 (17.5%) | 57 | 1 (3.9%) | 6 (9.4%) | 64 | .197 |
| Total protein (g/l) | <60a | 0 (0%) | 0 (0%) | 21 | 0 (0%) | 0 (0%) | 8 | NA |
| Vitamin A (μmol/l) | <0.7b | 0 (0%) | 0 (0%) | 30 | 0 (0%) | 0 (0%) | 4 | NA |
| Vitamin B1 (nmol/l) | <70b | 0 (0%) | 0 (0%) | 46 | 1 (6.7%) | 0 (0%) | 36 | NA |
| Vitamin B6 (nmol/l) | <35a | 0 (0%) | 0 (0%) | 48 | 0 (0%) | 0 (0%) | 35 | NA |
| Folic acid (nmol/l) | <5a | 1 (2.0%) | 6 (10.3%) | 58 | 2 (5.4%) | 0 (0%) | 66 | .008 |
| Vitamin B12 (pmol/l) | <200b | 8 (16.0%) | 2 (3.3%) | 60 | 10 (27.0%) | 20 (30.8%) | 65 | .000 |
| Vitamin D (nmol/l) | <50b | 15 (30.0%) | 15 (24.2%) | 62 | 13 (32.5%) | 19 (27.9%) | 68 | .779 |
| Magnesium (mmol/l) | <0.7a | 0 (0%) | 1 (3.5%) | 29 | 0 (0%) | 0 (0%) | 15 | .467 |
| Zinc | <9.2b | 0 (0%) | 15 (60.0%) | 25 | 0 (0%) | 1 (16.7%) | 6 | .056 |
| Parathyroid hormone | <1.3a | 4 (8.0%) | 1 (1.7%) | 60 | 1 (2.6%) | 1 (1.5%) | 66 | .915 |
N number of patients, SADI-S single anastomosis duodenoileal bypass, RYGB Roux-en-Y gastric bypass, M male, F female
aDutch Association for Clinical Chemistry and Laboratory Medicine [14]
bNutritional guidelines for the Surgical Weight Loss Patient 2016 [14]
*Calcium was corrected for albumin if albumin was also determined (Cacorr = total calcium – (0.025*albumin) + 1