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 |