Table 4.

Data regarding blood loss, pain, duration of surgery and length of stay

	Posterior (n = 656)	Hardinge (n = 312)	DAA (n = 116)	Anterolateral (n = 74)
Pre-op transfusiona	15	8	3	2
Post-op transfusiona	9	5	1	1
Hb dropb	3.25 ± 1.16	3.35 ± 1.01	2.23 ± 1.21	2.22 ± 1.03
Post-op pain (VAS score)	57.3 ± 23.6	58.1 ± 21.4	28.3 ± 16.4	33.2 ± 20.5
Duration of surgery (min)	31–47	30–48	30–45	30–46
Length of stay (days)	4.2 ± 2.3	4.8 ± 2.4	2.3 ± 1.6	2.8 ± 1.4

DAA direct anterior approach, VAS visual analoge scale, Hb hemoglobine

^aNumber of patients needed RBC transfusion

^bThis is the calculated difference between pre-operative and 1st postoperative day expressed in g/dL