Influence of Different Surgical Timing after Percutaneous Kyphoplasty for Osteoporotic Vertebral Compression Fractures: A Retrospective Study

Table 1

Characteristics of patients.

	Group A	Group B	Group C	P value
Cases (n)	52	50	47
Age (years)	70.48 ± 9.64	68.42 ± 10.65	67.92 ± 8.77	0.377
Gender (n, males/females)	10/42	9/41	11/36	0.786
Level (n, thoracic/lumbar)	17/35	16/34	18/29	0.775
BMI (kg/m^2)	24.88 ± 3.50	26.30 ± 3.36	25.37 ± 2.83	0.085
Operative time (min)	48.02 ± 7.62	49.10 ± 9.90	49.77 ± 10.11	0.636
Blood loss (ml)	9.42 ± 4.04	9.60 ± 4.39	10.32 ± 5.46	0.603
Cement volume (ml)	6.24 ± 1.32	6.15 ± 1.18	6.34 ± 1.20	0.751
Hospital stay (days)	5.71 ± 1.66	5.74 ± 1.32	6.57 ± 1.63	0.009

BMI: body mass index. value indicates statistical significance ().