Table 2.

The information of postoperative drainage

Variable	Group A	Group B	Group C	P
Volume of drainage in POD 1 (ml)	232.8 ± 75.9	175.6 ± 76.8	90.9 ± 49.8	P = 0.001
Volume of drainage in POD 2 (ml)	74.1 ± 32.8	57.3 ± 34.5	41.1 ± 23	P = 0.001
Total volume of drainage (ml)	301.3 ± 110.9	232.8 ± 98	131.9 ± 78	P = 0.001