Table 3.

Univariate and multivariate logistic regression analyses of major post-operative complications

	Odds ratio (95% CI)	p value	Odds ratio (95% CI)	p value
	Univariate analysis		Multivariate analysis
Frailty	3.61 (1.52–8.57)	0.004	2.77 (1.12–6.89)	0.028
Gender	1.56 (0.65–3.74)	0.322
Age	1.05 (1.00–1.11)	0.067	1.05 (0.99–1.11)	0.096
BMI	1.02 (0.84–1.23)	0.875
Smoking	2.17 (0.91–5.20)	0.079	2.25 (0.88–5.75)	0.090
Lung disease	0.80 (0.22–2.91)	0.731
Hypertension	2.14 (0.91–5.00)	0.079	2.02 (0.81–5.08)	0.133
Diabetes	1.90 (0.71–5.04)	0.202
Cardiovascular disease	1.45 (0.44–4.80)	0.538
Fusion level	1.28 (1.03–1.59)	0.029	1.28 (1.01–1.63)	0.042
Albumin	0.97 (0.85–1.10)	0.620
Total-cholesterol	1.07 (0.69–1.64)	0.772
Creatinine	1.01 (0.99–1.02)	0.176
White blood cells	1.07 (0.81–1.41)	0.647
Lymphocyte	0.97 (0.92–1.02)	0.223
Hemoglobin	0.98 (0.96–1.01)	0.236
Platelet	1.00 (0.99–1.01)	0.286