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Table 4 Baseline characteristics of participants classified by the presence or absence of ossification

From: Epidemiology of ossification of the spinal ligaments and associated factors in the Chinese population: a cross-sectional study of 2000 consecutive individuals

Number T-OALL ONL DISH
+(n = 383) -(n = 1617) p +(n = 630) -(n = 1370) p +(n = 77) -(n = 1923) p
Age(y) 55.2 ± 9.6 46.9 ± 9.3 < 0.001 51.7 ± 9.2 47.0 ± 9.8 < 0.001 58.7 ± 9.4 48.1 ± 9.7 < 0.001
Height(cm) 167.7 ± 7.6 167.3 ± 7.9 0.356 169.2 ± 7.0 166.6 ± 8.1 < 0.001 167.7 ± 7.5 167.4 ± 7.9 0.753
Weight(kg) 72.1 ± 11.7 68.0 ± 12.7 < 0.001 73.1 ± 11.8 66.7 ± 12.5 < 0.001 73.7 ± 13.5 68.6 ± 12.5 0.003
BMI(kg/m2) 25.5 ± 3.1 24.1 ± 3.3 < 0.001 25.4 ± 3.2 23.9 ± 3.3 < 0.001 26.1 ± 3.7 24.3 ± 3.3 < 0.001
CL(°) 8.9 ± 7.4 7.6 ± 5.9 0.002 7.8 ± 6.2 7.9 ± 6.2 0.879 10.9 ± 8.4 7.7 ± 6.1 0.001
TK(°) 22.2 ± 9.6 17.4 ± 6.9 < 0.001 19.2 ± 8.0 17.9 ± 7.5 < 0.001 24.4 ± 9.6 18.1 ± 7.5 < 0.001
LL(°) 43.4 ± 10.4 40.0 ± 10.4 < 0.001 40.3 ± 10.6 40.8 ± 10.5 0.399 43.5 ± 9.9 40.5 ± 10.5 0.013
SS(°) 38.2 ± 7.4 36.8 ± 11.1 0.027 36.6 ± 7.3 37.3 ± 11.7 0.148 37.9 ± 7.1 37.1 ± 10.6 0.511
SVA(cm) 2.12 ± 1.30 1.81 ± 2.10 0.006 2.07 ± 2.61 1.78 ± 1.59 0.002 2.38 ± 1.4 1.85 ± 1.99 0.022
  1. BMI body mass index, CL cervical lordosis, TK thoracic kyphosis, LL lumbar lordosis, SS sacral slope, SVA sagittal vertical axis, T thoracic, OALL ossification of the anterior longitudinal ligament, ONL ossification of the nuchal ligament, DISH diffuse idiopathic skeletal hyperostosis