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Table 1 Demographic characteristics

From: The relationship between S1 screw loosening and postoperative outcome in patients with degenerative lumbar scoliosis

  S1 screw non-loosening group S1 screw loosening group P value
Age 61.5 ± 7.3 65.3 ± 4.7 0.011
Sex (Male/Female) 9/37 5/27 0.656
BMI 26.3 ± 4.3 25.8 ± 4.3 0.67
Number of fused levels 6.2 ± 1.8 6.2 ± 2.0 0.968
Osteoporosis 20.6%(7/34) 75.0%(18/24) <0.001
L1-L4 average T score −0.6 ± 2.2 −1.7 ± 1.6 0.034
T score of total hip joint −1.0 ± 1 −1.6 ± 0.7 0.033
History of smoking 6.5%(3/46) 3.1%(1/32) 0.504
Menopause 78.3%(36/46) 78.1%(25/32) 0.989
Hypertension 32.6%(15/46) 62.5%(20/32) 0.009
Diabetes mellitus 23.9%(11/46) 21.9%(7/32) 0.834
Coronary artery disease 2.2%(1/46) 12.5%(4/32) 0.067
Fusion rate 95.7%(44/46) 90.6%(29/32) 0.373
Interbody fusion 78.3%(36/46) 75%(24/32) 0.789
L5/S1 interbody fusion 19.6%(9/46) 31.3%(10/32) 0.237
Deep infection 2.2%(1/46) 6.3%(2/32) 0.357
Cerebrospinal fluid leakage 2.2%(1/46) 0%(0/32) 0.401