Table 4.
Proportion of patients (%) with important biochemical variables below or above reference value prior to, and at 12 and 24 months after laparoscopic sleeve gastrectomy
| Variable | Preoperative | 12 months | 24 months | P value | ||
|---|---|---|---|---|---|---|
| |
|
|
|
12 vs. 0 months |
24 vs. 0 months |
24 vs. 12 months |
|
No. with available data/total no: |
95-117/117 |
98-107/117 |
65-95/117 |
|
|
|
| |
No. below or above reference/no with available data (%) |
|
|
|
||
| Hb<ref. (11,5-16,0 g/dl) |
7/117 (6%) |
5/105 (4.8%) |
4/95 (4.2%) |
1 |
1 |
1 |
| Ferritin<ref. (25-300 ug/l) |
13/116 (11.2%) |
20/101 (19.8%) |
28/85 (32.9%) |
0.021 |
0.001 |
0.118 |
| Folic acid<ref. (> 5 nmol/l) |
8/106 (7.5%) |
8/100 (8.0%) |
2/91 (2.2%) |
1 |
0.453 |
0.125 |
| Cobalamin<ref. (145–540 pmol/l) |
4/111 (3.6%) |
7/107 (6.5%) |
3/94 (3.2%) |
0.508 |
1 |
0.727 |
| 25(OH)D<ref. (30-150 nmol/l) |
29/110 (26.4%) |
5/105 (4.8%) |
8/79 (10.1%) |
<0.001 |
<0.001 |
0.289 |
| 25(OH)D<50 nmol/l) |
73/110 (66.4%) |
39/105 (37.1%) |
24/79 (30.4%) |
<0.001 |
<0.001 |
0.839 |
| 1,25(OH)2D>ref. (50-145 pmol/l) |
0/104 (0.0%) |
3/98 (3.1%) |
1/65 (1.5%) |
0.250 |
1 |
1 |
| ALP>ref. (< 105 U/l) |
6/116 (5.2%) |
5/107 (4.7%) |
7/94 (7.4%) |
1 |
1 |
0.688 |
| PTH>ref. (1.6-7.0 pmol/l) |
35/95 (36.8%) |
42/105 (40.0%) |
36/85 (42.4%) |
0.719 |
0.571 |
0.664 |
| Calcium<ref. (2.15 – 2.55 mmol/l) |
6/117 (5.1%) |
1/108 (0.9%) |
1/93 (1.1%) |
0.124 |
0.125 |
1 |
| Albumin<ref. (35-50 g/l) |
16/117 (13.7%) |
4/107 (3.7%) |
8/94 (8.5%) |
0.008 |
0.180 |
0.453 |
| ALT>ref (35 U/l) | 50/117 (42.7%) | 11/107 (10.3%) | 11/93 (11.8%) | <0.001 | <0.001 | 1 |
No = Number. Hb = Hemoglobin. Ref = Reference value. 25(OH)D = 25 hydroxyvitamin D. 1,25(OH)2D = 1,25 dihydroxyvitamin D. ALP = Alkaline Phosphatase. PTH = Parathyroid hormone. ALT = Alanine aminotransferase.