High Systemic Immune-Inflammation Index and Body Mass Index Are Independent Risk Factors of the Thoracic Ossification of the Ligamentum Flavum

Table 2

Univariate analysis for potential risk factors of thoracic OLF.

Variables	OLF group ()	Control group ()
Gender			0.26
Male	31/65%	25/53%
Female	17/35%	22/47%
Age (year)			0.03
BMI (kg/m^2)			<0.01
Coexistence of hypertension or diabetes			0.38
No	34/70%	37/79%
Yes	14/30%	10/21%
NLR			<0.01
PLR			0.39
MLR			0.11
SII			<0.01

OLF: ossification of the ligamentum flavum; BMI: body mass index; NLR: neutrophil-to-lymphocyte ratio; PLR: platelet-to-lymphocyte ratio; MLR: monocyte-to-lymphocyte ratio; SII: systemic immune inflammation index. Variables with were further included into the multivariate logistic regression analysis.