From: An audit to determine if vitamin b12 supplementation is necessary after sleeve gastrectomy
Authors | Vitamin B 12 | Folate | Zinc | Ferritin | Iron | |
---|---|---|---|---|---|---|
Gehrer S. et al (Gehrer et al. 2010) | Total (n) | 50 | 50 | 50 | - | 50 |
 | Deficiency n (%) | 18% | 22% | 34% | NR | 18% |
 | Abnormal level | <150 pmol/l | <6 nmol/l | <11.5 μmol/l |  | <30 ng/ml |
Toh S.Y. et al (Toh et al. 2009) | Total (n) | 9 | 5 | - | 9 | 9 |
 | Deficiency n (%) | 0% | 0% | NR | 0% | 11% |
 | Abnormal level | <145pmol/l | <7nmol/l |  | <15μg/l | <9μmol/l |
Aarts E.O. et al (Aarts et al. 2011) | Total (n) | 60 | 60 | - | - | 60 |
 | Deficiency n (%) | 9% | 15% | NR | NR | 43% |
 | Abnormal level | <150pmol/l | <9nmol/l |  |  | <9μmol/l |
Hakeam A.H. et al (Hakeam et al. 2009) | Total (n) | 61 | 61 | - | 61 | 61 |
 | Deficiency n (%) | 19.6% | 6.5% | NR | 1.6 % | 4.9% |
 | Abnormal level | <145pmol/l | <776 nmol/l |  | Male <30μg/l | <8μmol/l |
 |  |  |  |  | Female<13μg/l |  |
Kehagias I. et al (Kehagias et al. 2011) | Total (n) | 28 | 28 | - | 28 | 28 |
 | Deficiency n (%) | 4% | 0% | NR | 18% | 18% |
 | Abnormal level | <200pg/ml | <1.5ng/ml |  | <9ng/ml | <50mg |