Table 5.

Multiple linear regression analysis of the association between specific variables and the number of blood packs used per patient.

Variable	p-value	Beta-exp
Sex	0.122	0.185
Age	0.769	0.035
Diagnosis	0.187	0.159
Preoperative Cobb angle	0.756	-0.039
Surgery duration (minutes)	0.111	0.231
Levels of arthrodesis	0.001	0.199