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Table 7 Necessity of vitamin B12 supplementation during the follow-up period

From: Complications and nutrient deficiencies two years after sleeve gastrectomy

  BMI
35-39.9 kg/² 40-49.9 kg/² 50-59,9 kg/² ≥ 60 kg/² Total
Vitamin B12 [n] [%] [n] % [n] [%] [n] [%] [n] [%]
After OP 0 0.0 0 0.0 0 0.0 1 4.5 1 1.0
After 3 months 1 12.5 4 13.8 5 12.2 2 9.1 12 12.0
After 6 months 0 0.0 2 6.9 4 9.8 2 9.1 8 8.0
After 12 months 0 0.0 1 3.4 0 0.0 2 9.1 3 3.0
After 24 months 0 0.0 0 0.0 0 0.0 0 0.0 0 0.0
After 2nd OP 1 12.5 2 6.9 10 24.4 5 22.7 18 18.0
Total 2 25.0 9 31.0 19 46.3 12 54.5 42 42.0