Table I.

Main characteristics of the group at baseline and 1 year after the operation

Variables	Baseline (n = 103)	One year after (n = 90)	Value of p	Absolute difference
Gender, males/females	34/69	29/61	NS	N/A
Age [years]	45.9 ±11.7	46.1 ±11.2	NS	N/A
Height [cm]	170.2 ±10.0	170.1 ±10.0	NS	N/A
Body weight [kg]	137.7 ±24.4	117.3 ±24.9	< 0.0001	20.4 ±11.95
BMI [kg/m2]	47.5 ±7.4	40.9 ±8.4	< 0.0001	6.6 ±3.96
Fat mass [kg]	60.4 ±12.9	47.6 ±13.4	< 0.0001	12.8 ±7.57
Excess body weight [kg]	65.0 ±21.2	46.0 ±23.9	< 0.0001	19 ±15.3
Excess body weight [%]	46.11 ±8.2	36.35 ±13.1	< 0.0001	9.76 ±7.57
Excess BMI [kg/m2]	22.5 ±7.4	15.9 ±8.4	< 0.0001	6.6 ±5.13
Waist circumference [cm]	136.0 ±18.0	119 ±18.5	< 0.0001	17 ±9.82
TG [mmol/l]	2.30 ±1.73	1.68 ±1.27	< 0.0001	0.62 ±0.80
HDL [mmol/l]	1.18 ±0.34	1.34 ±0.34	< 0.0001	–0.16 ±0.24
Glu [mmol/l]	6.36 ±2.28	5.48 ±1.0	0.003	0.88 ±1.35
HbA1c [%]	6.18 ±1.19	5.57 ±0.58	< 0.0001	0.61 ±0.85

BMI – body mass index, TG – triglycerides, HDL – high density lipoprotein cholesterol, Glu – fasting plasma glucose, HbA_1c – glycosylated hemoglobin