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Table 1 Characteristics of patients

From: Accuracy of pedicle screw insertion for unilateral open transforaminal lumbar interbody fusion: a side-by-side comparison of percutaneous and conventional open techniques in the same patients

VariablesP-side O-side
Number of patients 181 
Age (year ± SD) 69.0 ± 10.9 
Gendermale 91 
female 90 
BMI (m/kg2 ± SD) 24.1 ± 3.7 
Fusion level1-level 160 
2-level 21 
Pedicle screw level (No. of screw)
Screw total 766 
  1. PPS Percutaneous Pedicle screw, SD Standard deviation, BMI Body Mass Index, No Number, P-side PPS side, O-side Open side