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Table 3 Serum concentrations and prevalence $ (under/in/above reference range) of calcium and vitamins preoperatively and 12 months after LSG

From: Energy intake, nutritional status and weight reduction in patients one year after laparoscopic sleeve gastrectomy

 

Preoperative (N = 150)

12 months postoperative (N = 125)

 

Median

Inter quartile range

Prevalence (%)

Median

Inter quartile range

Prevalence (%)

Calcium, mmol/L

2.36

2.29–2.41

5/92/3

2.33*

2.27–2.40

4/95/1

Folate1, nmol/L

11.3

8.2–15.8

23/77

16.0**

10.7–23.0

8/92†

Cobalamin , pmol/L

265

202–323

16/82/2

278*

209–421

8/86/6

Vitamin E2, umol/L

23.8

20.3–28.7

3/91/6

23.7

19.9–27.7

1/97/2

25-OH-vitamin D3, pmol/L

50.1

36.3–65.0

47/52/1

50.0

35.3–68.9

49/51/0

1,25-di-OH-vitamin D4

84

67–104

8/89/3

84

68–102

3/96/1

  1. 1N = 119 twelve months postoperatively, 2 N = 120 twelve months postoperatively, 3 N = 117 twelve months postoperatively, 4 N = 141 preoperatively, N = 111 twelve months postoperatively.
  2. $Reference ranges used: Calcium 2.20-2.55 mmol/L; Folate > 8 nmol/L; Cobalamin 175–700 pmol/L; Vitamin E 11.6-40.0 umol/L; 25-hydroxyvitamin D 50–150 pmol/L; 1,25-dihydroxy-vitamin D 50–150 pmol/L.
  3. Wilcoxon Signed-Rank Test for pair wise comparison was used to investigate changes over time.
  4. *significantly different from preoperatively (p < 0.05).
  5. **significantly different from preoperatively (p < 0.001).
  6. McNemar Test was used to compare the prevalence of values below normal reference range between pre and post surgery values.
  7. †significantly different from preoperatively (p < 0.005).
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