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Table 4 Serum concentrations and prevalence $ (under/in/above reference range) of albumin, haemoglobin, creatinine, uric acid, PTH and CRP preoperatively and 3 and 12 months after LSG

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

 

Preoperative (N = 150)

3 months postoperative (N = 139)

12 months postoperative (N = 125)

 

Median

Inter quartile range

Prevalence (%)

Median

Inter quartile range

Prevalence (%)

Median

Inter quartile range

Prevalence (%)

Albumin1, g/L

44

43–46

1/78/21

43**

41–45

2/83/15

43**

42–45

0/91/9

Haemoglobin, g/dL

14.1

13.4–14.9

1/98/1

13.9*

13.0–14.7

7/89/4†

13.7**,***

13.0–14.4

5/94/1

Creatinine, umol/L

65

57–72

6/91/3

63*

56–70

4/95/1

60**,****

55–66

10/89/1

Uric acid, umol/L

354

305–421

0/99/51

NA

284**

248–340

1/92/7†

PTH, pmol/L

4.1

3.0–6.1

2/80/18

NA

5.0*

3.5–6.7

2/77/21

CRP2, mg/L

6.0

4.0–11.0

37/63

4.0*

4.0–8.0

57/43 †

4.0**,****

4.0–4.0

90/10†‡

  1. 1N = 105 three months postoperatively, 2 N = 142 preoperatively, N = 105 three months postoperatively.
  2. $Reference ranges used: Albumin 18–39 yr: 36–48 g/L, 40–69 yr: 36–45 g/L; Hemoglobin F ≥ 18 yr: 11.7-15.3 g/dL, M ≥ 18 yr: 13.4-17.0 g/dL; Creatinine F: 45–92 umol/L, M:60–105 umol/L; Uric acid F < 50 yr: 155–350 umol/L, F > 50 yr: 155–400 umol/L, M:230–480 umol/L; PTH 1.3-6.8 pmol/L; CRP <5 mg/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. ***significantly different from 3 months postoperatively (p < 0.05).
  7. ****significantly different from 3 months postoperatively (p < 0.001).
  8. NA not available.
  9. McNemar Test was used to compare the prevalence of values below normal reference range between pre and post surgery values.
  10. †significantly different from preoperatively (p < 0.005).
  11. ‡ significantly different from 3 months postoperatively (p < 0.005).
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