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Table 1 Comparison of data between the percutaneous and open groups

From: Comparison of two-stage open versus percutaneous pedicle screw fixation in treating pyogenic spondylodiscitis

  Percutaneous group (n = 20) Open group (n = 25) P value
Age (yr) 59.6 64.7 0.113
Sex 14 males 11 males 0.085
6 females 14 females  
Anterior operative time (min) 149 ± 39.5 156 ± 33.7 0.534
Anterior blood loss (mL) 577.5 ± 203.4 594 ± 194.1 0.788
Posterior operative time (min) 102.5 ± 28.3 129 ± 20.9 0.001*
Posterior blood loss (mL) 89 ± 34.6 344.8 ± 155.2 <0.001*
Number of analgesic injections 3.9 ± 2.1 5 ± 1.4 0.042*
VAS score, next day after posterior instrumentation 4 ± 1.3 5.5 ± 1.2 <0.001*
VAS score, 7 days after posterior instrumentation 2.8 ± 1.2 3.5 ± 0.9 0.03*
  1. VAS, visual analogue scale.
  2. Data presented as mean ± standard deviation, and *P < 0.05.