Table 1: Patientsí descriptive data.

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