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Table 1 The general data of patients in this study

From: Is unilateral transverse process-pedicle percutaneous kyphoplasty a better choice for osteoporotic thoracolumbar fractures in the old patients?

  Improved unilateral group Unilateral group Bilateral group
No. of patients 135 211 101
No. of vertebral bodies (units) 148 229 122
Sex(male/female) 28/107 65/146 25/76
Age 76.8 ± 7.5 76.7 ± 6.9 75.8 ± 7.5
Bone density (t value) − 3.05 ± 0.57 − 3.15 ± 0.64 − 3.00 ± 0.78
Surgery duration/min 33.5 ± 10.3 22.4 ± 8.0** 35.3 ± 12.1
Intraoperative bone cement amount/ml 5.6 ± 1.3 4.2 ± 1.2** 5.5 ± 1.0
VAS
 Preoperative 7.53 ± 1.18 7.13 ± 1.11 7.62 ± 1.07
 Postoperative day 1 3.32 ± 0.84 (55.1 ± 12.2) 3.21 ± 0.64 (54.2 ± 10.5) 3.16 ± 0.84 (55.5 ± 12.3)
 Last follow-up 2.32 ± 0.77 (68.3 ± 12.0) 2.44 ± 0.85 (65.1 ± 11.2) 2.33 ± 0.54 (68.6 ± 9.8)
ODI score
 Preoperative 34.7 ± 6.0 33.8 ± 6.5 35.1 ± 5.8
 Postoperative day 1 13.6 ± 4.5 (60.1 ± 13.4) 18.6 ± 4.1 (59.3 ± 11.7) 17.7 ± 3.8 (60.5 ± 13.9)
 Last follow-up 9.6 ± 4.1 (71.2 ± 13.7) 17.1 ± 3.8 (72.4 ± 14.6) 16.8 ± 3.6 (74.1 ± 10.9)
Cobb’s Angle (Coronal)
 Preoperative 2.2 ± 2.3 6.5 ± 3.2 2.4 ± 2.3
 Postoperative day 1 1.7 ± 2.6 1.9 ± 2.5 2.1 ± 2.1
 Last follow-up 1.9 ± 2.5 2.0 ± 2.6 2.0 ± 2.0
Cobb’s Angle (Sagittal)
 Preoperative 17.6 ± 2.1 17.4 ± 2.7 17.1 ± 2.2
 Postoperative day 1 9.6 ± 2.3 (46.2 ± 7.3) 9.8 ± 3.4 (45.0 ± 14.1) 9.2 ± 2.5 (46.7 ± 8.3)
 Last follow-up 10.4 ± 2.5 (41.2 ± 8.4) 10.5 ± 3.3 (40.4 ± 13.8) 10.1 ± 2.8 (41.5 ± 11.8)
Vertebral height/mm
 Preoperative 17.3 ± 1.8 17.6 ± 2.9 17.5 ± 2.2
 Postoperative 19.3 ± 1.9 (11.7 ± 5.0) 19.2 ± 2.2 (11.8 ± 5.0) 19.5 ± 2.3 (11.6 ± 4.9)
 Last follow-up 18.6 ± 2.0 (7.3 ± 6.9) 18.4 ± 2.4 (7.0 ± 6.5) 19.2 ± 2.1 (9.7 ± 3.2)
Bone cement Leakage/ per vertebra 24 (16.2%) 65 (28.4%)** 19 (15.6%)