Table 4.

Biochemical and nutritional parameters in the two groups at 12 and 60 months after bariatric surgery.

Baseline			12 months			60 months
Variables	CG	OG	CG	OG	P	CG	OG	P
Albumin (g/L)	43.37 (0.23)	43.25 (0.26)	42.46 (0.23)	42.52 (0.26)	0.867	42.57 (0.28)	42.03 (0.30)	0.197
Prealbumin (g/L)	0.25(0.01)	0.24 (0.01)	0.24 (0.01)	0.23 (0.01)	0.075	0.24 (0.01)	0.23 (0.01)	0.221
Calcium (mg/dl)∗	9.56 (0.12)	10.01 (0.13)	9.67 (0.12)	9.75 (0.13)	0.651	9.51 (0.14)	9.48 (0.15)	0.870
Magnesium (mg/dl)	1.96 (0.01)	2.00 (0.02)	2.01 (0.01)	2.04 (0.01)	0.317	2.00 (0.02)	2.03 (0.02)	0.345
Phosphorous (mg/dl)	3.45 (0.04)	3.42 (0.04)	3.75 (0.04)	3.70 (0.04)	0.476	3.52 (0.05)	3.48 (0.05)	0.616
PTH (pg/ml)	86.43 (3.15)	88.74 (3.59)	62.07 (3.22)	60.34 (3.58)	0.720	83.71 (3.75)	80.24 (3.96)	0.524
25 (OH) VD (ng/mL)	15.23 (0.90)	15.31 (1.02)	27.39 (0.93)	27.47 (1.02)	0.949	25.71 (1.12)	27.47 (1.17)	0.280
Iron (mcg/dl)	72.06 (2.70)	72.34 (3.06)	90.00 (2.74)	92.94 (3.06)	0.476	92.24 (3.25)	86.28 (3.42)	0.280
Transferrin (g/L)	2.74 (0.03)	2.66 (0.04)	2.36 (0.03)	2.37 (0.04)	0.868	2.63 (0.04)	2.51 (0.04)	0.049
Vitamin B12 (pg/ml)	419.11 (30.11)	434.18 (34.23)	771.09 (30.87)	707 (34.15)	0.170	634.41 (36.35)	690.73 (38.14)	0.285
Folic acid (ng/dl)	414.76 (11.86)	392.69 (13.30)	429.36 (12.19)	450.27 (13.33)	0.247	513.79 (14.64)	516.04 (15.06)	0.914
Anemia (%)∗∗	20.85	16.80	16.51	13.66	0.484	14.04	21.15	0.599

Data are mean (ES). Cut-off for deficiency: albumin: 31–48 g/L; pre-albumin: 0.200–0.400 g/L; ^∗corrected calcium: 8.5–10.5 mg/dL; magnesium: 1.8–2.6 mg/dL; phosphorous: 2.3–4.3 mg/dL; PTH: 80 pg/mL; 25 (OH) VD: <30 ng/mL; Iron: 50–170 µg/dL; transferrin: 2.5–3.8 g/L; folic acid: >150 ng/mL. ^∗∗Anemia: hemoglobin in males<137 g/L; hemoglobin in females<122 g/L.