TABLE 4. Evolution of vitamin and protein metabolism biochemical indicators at preoperative time and 1, 2, 3, 4, 5 and 10 years of Roux-en-Y gastric bypass.
| Albumin | Total protein | Vitamin B12 | Folic acid | |||||||||
| (g/dl) | (g/dl) | (Ng/ml) | (Pg/ml) | |||||||||
| n | Mean±SD | (%) | n | Mean±SD | (%) | n | Mean±SD | (%) | n | Mean±SD | (%) | |
| Preoperative | 380 | 4.1±1.9 | 5.8 | 345 | 7.0±0.5 | 3.5 | 308 | 408.2±201.0 | 4.2 | 315 | 10.1±5.4 | 1.3 |
| 1 year PO | 328 | 4.2±2.1 | 4.0 | 296 | 6.7±0.5a | 3.7 | 294 | 346.4±202.6a | 6.8 | 278 | 15.1±6.5a | 0.7 |
| 2 years PO | 152 | 4.1±0.3 | 2.6 | 148 | 6.8±0.4a | 4.1 | 142 | 315.1±171.6a | 12 | 143 | 14.9±6.7a | 0 |
| 3 years PO | 135 | 4.4±3.2 | 1.5 | 131 | 6.7±0.5a | 3.8 | 122 | 332.2±189.0a | 11.5 | 126 | 15.0±6.3a | 0.8 |
| 4 years PO | 100 | 4.1±0.2 | 2 | 94 | 6.7±0.5a | 3.2 | 94 | 284.3±178.9a,b | 20.2 | 90 | 15.8±6.8a | 2.2 |
| 5 years PO | 58 | 4.2±0.2 | 1.7 | 59 | 6.7±0.4a | 1.7 | 62 | 310.4±186.0a | 17.7 | 62 | 16.3±6.3a | 0 |
| 10 years PO | 27 | 4±0.4 | 3.7 | 27 | 6.5±0.7a | 11.1 | 27 | 379.8±255.6 | 11.1 | 27 | 18.3±6.5 a | 3.7 |
PO=postoperative time; n=number of patients evaluated; (%)=percentage of patients with values outside the normal range; a=p<0.05 compared to preoperative; b=p<0.05 compared to one year PO; c=p<0.05 compared to two years PO