Hemoglobin loss method calculates blood loss during pancreaticoduodenectomy and predicts bleeding-related risk factors

Table 2 Comparison of blood loss between the open and laparoscopic pancreaticoduodenectomy groups

Blood loss	OPD group, n = 175	LPD group, n = 166	χ2/Z value	P value
IEBL in mL	100.0 (50.0, 300.0)	200.0 (50.0, 200.0)	-1.084	0.278
ICBL in mL	663.8 (347.7, 1138.2)	767.7 (435.4, 1249.0)	-1.833	0.067
PCBL in mL	806.1 (375.9, 1347.6)	1061.6 (612.3, 1632.3)	-3.112	0.002

ICBL: Intraoperative calculation of blood loss; IEBL: Intraoperative estimation of blood loss; LPD: Laparoscopic pancreaticoduodenectomy; OPD: Open pancreaticoduodenectomy; PCBL: Perioperative calculation of blood loss.