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Table 2 VAS pain assessments of two groups

From: Minimally invasive pedicle screw fixation combined with percutaneous vertebroplasty for preventing secondary fracture after vertebroplasty

Group Preoperative Postoperative 1 month 2 months 3 months 6 months 1 year 2 years
1 9.1 ± 1.1 2.2 ± 1.4 2.5 ± 1.2 2.2 ± 1.2 1.7 ± 1.0 1.3 ± 0.9 0.9 ± 1.1 0.9 ± 1.1
2 9.1 ± 1.0 2.4 ± 0.9 1.7 ± 0.8 1.2 ± 0.6 1.0 ± 0.7 0.9 ± 0.7 0.6 ± 0.6 0.5 ± 0.6
  1. Values are expressed as the mean ± SD. There was significant difference (P < 0.005) 1 month, 2 months, and 3 months after surgery between the two groups. The VAS after surgery was significantly lower (P < 0.005) than that of before surgery in two groups. The VAS immediately after surgery was significantly higher (P < 0.05) than that of 6 months, 1 year, and 2 years in group 1. The VAS immediately after surgery was significantly higher (P < 0.05) than that of 1 month, 2 months, 3 months, 6 months, 1 year, and 2 years in group 2.