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Table 1 Demographic characteristics and surgery-related factors of the patients

From: Risk factors for predicting symptomatic adjacent segment degeneration requiring surgery in patients after posterior lumbar fusion

Characteristics Patients with SASDS Pvalues
Yes (n = 28) No (n = 56)
Age (years) 61.4 ± 12.0 62.1 ± 10.3 0.767
Sex, n (%)    0.516
Male 11 (39.3) 18 (32.1)  
Female 17 (60.7) 38 (67.9)  
BMI (kg/m2) 27.9 ± 2.3 25.2 ± 3.3 0.000
Smoker within past year, n (%)    0.259
Yes 8 (28.6) 10 (17.9)  
No 20 (71.4) 46 (82.1)  
Diagnosis, n (%)    0.446
 Disc herniation 3 (10.7) 12 (21.4)  
 Lumbar spondylolisthesis 3 (10.7) 4 (7.1)  
 Lumbar stenosis 22 (78.6) 40 (71.4)  
No. of levels fused 1.50 ± 0.69 1.57 ± 0.63 0.637
Fusion method, n (%)    0.577
PLF 25 (89.3) 52 (92.9)  
PLIF 3 (10.7) 4 (7.1)  
Allograft, n (%)    0.271
Yes 19 (67.9) 31 (55.4)  
No 9 (32.1) 25 (44.6)  
  1. Note: SASDS symptomatic adjacent segment degeneration surgery, ASD adjacent segment degeneration, BMI body mass index, PLIF posterior lumbar interbody fusion, PLF posterior lumbar fusion.