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Table 2 Published articles reporting vitamin B12 deficiency

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

  1. NR= not reported in the study.