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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)
 L222
 L34747
 L4141141
 L5145145
 S14848
 Total383383
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