Table 2.

Spearman correlation matrix for comparison of blood loss estimate formulae.

	Liu EBL (mL)	Mercuriali EBL (mL)	Bourke EBL (mL)	Ward EVL (mL)	Gross EBL (mL)	Lisander EBL (mL)	Meunier EBL (mL)
Liu EBL (mL)	1.000	0.849	0.375	N/A	0.374	0.906	0.632
Mercuriali EBL (mL)	0.849	1.000	0.412	N/A	0.381	0.969	0.611
Bourke EBL (mL)	0.375	0.412	1.000	0.972	0.408	0.421	0.163
Ward EVL (mL)	N/A	N/A	0.972	1.000	0.113	0.993	0.948
Gross EBL (mL)	0.374	0.381	0.408	0.113	1.000	0.334	0.292
Lisander EBL (mL)	0.906	0.969	0.421	0.993	0.334	1.000	0.645
Meunier EBL (mL)	0.632	0.611	0.163	0.948	0.292	0.645	1.000

Key: EBL = estimated blood loss; EVL = estimated volume loss; mL = millilitres.