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Table 1 Baseline characteristics

From: Vertebral fracture in elderly female patients after posterior fusion with pedicle screw fixation for degenerative lumbar pathology: a retrospective cohort study

Characteristic group A (n = 53) group B (n = 72) P value
Age at surgery, mean (SD), years 74.2 (4.2) 61.7 (5.5) < 0.001
Diagnosis, n (%)    0.66
 Degenerative spondylolisthesis 26 (49.0) 38 (52.8)  
 Spinal stenosis 26 (49.0) 31 (43.0)  
 Spondylotic spondylolisthesis 1 (1.9) 3 (4.2)  
BMD YAM, mean (SD), % 81.7 (16.3) 85.1 (16.9) 0.32
Surgical Procedure, n (%)    0.88
 PLIF 18 (33.9) 24 (33.3)  
 PLF 12 (22.6) 19 (26.4)  
 PLF combined with PLIF 23 (43.4) 29 (40.3)  
Number of levels fused, mean (SD), n 2.2 (0.9) 2.1 (0.9) 0.37
Types of fusion length, n (%)    0.37
 short-segment fusion (1 or 2 levels) 32 (60.3) 49 (68.0)  
 long-segment fusion (3 or 4 levels) 21 (39.6) 23 (31.9)  
Fusion to lumbosacral junction, n (%) 14 (26.4) 10 (19.4) 0.35
Use of a transverse fixator 22 (41.5) 23 (31.9) 0.27
  1. BMD indicates bone mineral density; YAM, young adult mean; PLIF indicates posterior lumbar interbody fusion; PLF, posterolateral fusion