Table 2.

Comparison of both groups in terms of outcomes and complications

	Sequential	Simultaneous	P
Operative time	7 h 30 min	5 h 12 min	<0.05
Blood transfusion	1,460 ml	960 ml	<0.05
Minor complications	30%	26%	>0.05
Major complications	14%	7%	<0.05
Postoperative hospitalisation	27 days	25 days	>0.05
Correction of kyphosis	16 degrees	17.1 degrees	>0.05
Number levels fused	4.2	3.8	>0.05