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Table 2 Perioperative and clinical outcomes

From: Postoperative spinal orthosis may not be necessary for minimally invasive lumbar spine fusion surgery: a prospective randomized controlled trial

  Group A (n = 42) Group B (n = 42) p
Operative time (hours, mean ± SD)) 3.9 ± 1.02 4.2 ± 1.05 0.480
Timing of ambulation (days, (mean ± SD) 2.2 ± 1.22 2.0 ± 1.12 0.220
Length of stay (days, (mean ± SD) 7.0 ± 2.23 6.9 ± 1.98 0.588
VAS (mean ± SD)
 Preoperative 5.9 ± 1.4 5.6 ± 0.8 0.181
 Postoperative 1 months 1.4 ± 1.30 1.3 ± 0.97 0.923
 Postoperative 3 months 1.30 ± 1.13 1.2 ± 0.96 0.823
 Postoperative 6 months 1.4 ± 1.12 1.1 ± 0.57 0.259
 Postoperative 12 months 1.2 ± 1.46 1.1 ± 1.18 0.882
ODI (mean ± SD)
 Preoperative 51.0 ± 13.9 48.3 ± 10.6 0.469
 Postoperative 1 month 18.0 ± 4.42 18.8 ± 10.11 0.764
 Postoperative 3 months 14.0 ± 9.40 13.2 ± 6.16 0.777
 Postoperative 6 months 10.3 ± 4.96 10.2 ± 5.35 0.982
 Postoperative 12 months 8.6 ± 4.90 8.2 ± 5.63 0.898
  1. VAS Visual Analogue Scale, ODI Oswestry disability index