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Table 2 Intra- and postoperative data

From: Bone resorption during the first year after implantation of a single-segment dynamic interspinous stabilization device and its risk factors

  Bone resorption (n = 29) Nobone resorption (n = 15) p
Intraoperative    
Operating time, h 2.3 ± 0.4 2.3 ± 0.5 .598
Blood loss, mL 181.4 ± 169.1 127.3 ± 85.7 .167
Postoperative
Hospital stay, d 18.1 ± 3.1 16.3 ± 2.6 .058
Time wearing brace, mo    .720
≤3 11 (37.9) 8 (53.3)  
4-5 3 (10.3) 1 (6.7)  
≥6 15 (51.7) 6 (40.0)  
Time performing low back muscle exercises, mo    .299
0 13 (44.8) 8 (53.3)  
≤3 6 (20.7) 0 (0.0)  
3-6 5 (17.2) 4 (26.7)  
≥7 5 (17.2) 3 (20.0)  
  1. Data are presented as mean ± standard deviation or counts (percentage).