Mean	SD	Min.	Max.
Age, y	62.8	14.4	25	86
BMI	29.9	4.3	19.8	39.8
Operating time, min	279.2	76.1	170	570
No. fused segments	1.9	1.5	1	9
CK, IU/L	1185.8	1234.6	134	6028
CRP, mg/L	28.2	22.3	2.1	142.2