Table 2.

Changes in BW, BMI, TWL, and EWL before and after surgery.

Characteristic	Preoperative	3 months after surgery	6 months after surgery	12 months after surgery
BW1 (kg)	127.67 ± 26.21	98.58 ± 20.83	86.10 ± 16.42	74.64 ± 12.71
BMI2 (kg/m2)	42.93 ± 6.82	33.19 ± 5.74	29.03 ± 4.52	25.30 ± 3.66
%TWL3	–	22.67 ± 4.94	32.10 ± 5.18	40.56 ± 7.89
%EWL4	–	62.07 ± 26.56	85.93 ± 27.92	106.65 ± 29.65

	P-valuea	P-valueb	P-valuec
BW1 (kg)	0.000	0.000	0.000
BMI2 (kg/m2)	0.000	0.000	0.000
%TWL3	–	0.000	0.000
%EWL4	–	0.000	0.000

¹Body weight; ²Body mass index; ³Percentage of total weight loss; ⁴Percentage of excess weight loss.

^aRepresents the comparison between preoperative and 3 months after operation.

^bRepresents the comparison between3 and 6 months after operation.

^cRepresents the comparison between6 and 12 months after operation.