Clinical comparison of laparoscopic vs open distal gastrectomy for advanced gastric cancer: Perioperative safety, recovery, and survival

Table 4 Postoperative blood test results, mean ± SD

Parameters	Laparoscopy (n = 213)	Open surgery (n = 207)	t	P value
WBC (× 109/L)
Preop	6.72 ± 1.14	6.71 ± 1.07	0.096	0.924
POD1	11.18 ± 2.11	11.81 ± 2.22	2.978	0.003
POD5	7.15 ± 2.51	7.20 ± 2.70	0.209	0.835
Hb (g/dL)
Preop	13.44 ± 2.01	13.30 ± 2.04	0.709	0.479
POD1	12.15 ± 1.64	11.89± 1.81	1.546	0.123
POD5	11.51 ± 1.41	11.14 ± 1.61	2.490	0.013
Platelet (× 109/L)
Preop	257.39 ± 66.51	258.28 ± 63.91	0.139	0.889
POD1	208.24 ± 51.99	217.14 ± 53.85	1.723	0.086
POD5	240.01 ± 66.64	253.44 ± 70.84	2.002	0.046
Total bilirubin (mg/dL)
Preop	0.76 ± 0.21	0.77 ± 0.24	0.143	0.887
POD1	0.91 ± 0.23	0.92 ± 0.26	0.278	0.781
POD5	0.84 ± 0.25	0.83 ± 0.26	0.224	0.823
Amylase (U/dL)
Preop	73.21 ± 20.68	71.42 ± 20.13	0.902	0.368
POD1	137.21 ± 33.41	133.59 ± 35.77	1.071	0.285
POD5	92.34 ± 26.51	91.35 ± 20.81	0.429	0.668

WBC: White blood cell count; POD: Postoperative day; Hb: Hemoglobin.