The pressure field as a methodology for fluid management and red cell preservation during cardiac surgery

Table 3 Resulting model from stepwise multiple regression with pre- to post-operative change in blood haemoglobin concentration

Term	ß	Standardised ß	p
Method (conventional/pressure field)	41 ± 2	0.58 ± 0.03	< 0.0001
Initial [Hb]	− 0.57 ± 0.04	− 0.44 ± 0.03	< 0.0001
CAG	− 6.1 ± 1.9	− 0.13 ± 0.04	0.0012
Method * MVR	− 29 ± 7	− 0.12 ± 0.03	< 0.0001
Method * AVR	− 16 ± 4	− 0.12 ± 0.03	< 0.0001
Female	− 0.04 ± 0.01	− 0.10 ± 0.03	0.0008
Myxoma	− 18 ± 9	− 0.06 ± 0.03	0.0142
AVR	− 0.13 ± 1.85	− 0.05 ± 0.04	0.1957
MVR	2.6 ± 2.8	− 0.02 ± 0.03	0.5592

The method (conventional/pressure field) had the largest impact with a standardised β of 0.58 ± 0.03. Table ordered from largest to smallest absolute standardised β value. P-values < 0.05 are indicated in bold type

ISSN: 1749-8090