Table 1.

Vitamin deficiency before surgery, 1, 2, and 3 years after surgery, and reference values for micronutrients

	Baseline, %	Year 1, %	Year 2, %	Year 3, %
Ferritin (15–150 µg/L)	8.3	21.6	35.0	32.5
Hemoglobin (>12.5/>13 g/dL)	15.1	28.2	36.4	37.0
Vitamin B12 (188–771 pg/mL)	4.8	14.3	1.8	6.3
Folic acid (5.3–18.7 ng/mL)	62.4	29.7	21.6	15.3
25-OH-vitamin D (>75 nmol/L)	93.9	70.8	67.0	57.4
Vitamin A (1.05–2.45 µmol/L)	5.7	13.2	8.9	12.8
Vitamin E (11.6–46.4 µmol/L)	0	0	0	0
Copper (0.81–1.94 mg/L)	4.4	10.4	12.2	11.9
Zinc (0.54–1.03 mg/L)	1.0	1.7	0	1.5
Selenium (50–120 µg/L)	0	11.1	4.3	0