Elevated blood urea nitrogen is associated with recurrence of post-operative chronic subdural hematoma

BMC Neurology

Table 5 Multivariate adjusted odds ratios for the association between BUN levels and Recurrence

	Quartile	OR^a	95%CI	P-value
Unadjusted	Middle	1.751	0.863–3.554	0.121
	Higher	1.910	0.951–3.837	0.069
	Highest	3.315	1.711–6.423	< 0.001
Model 1^b	Middle	1.590	0.778–3.252	0.204
	Higher	1.713	0.842–3.483	0.137
	Highest	2.892	1.463–5.717	0.002
Model 2^c	Middle	1.612	0.788–3.299	0.191
	Higher	1.768	0.866–3.611	0.118
	Highest	2.939	1.480–5.836	0.002
Model 3^d	Middle	1.612	0.780–3.333	0.197
	Higher	1.733	0.837–3.590	0.139
	Highest	3.069	1.488–6.330	0.002

OR, odds radio; CI confidence level; Cr, creatinine; Recurrence of postoperative CSDH
^a Reference OR (1.000) is the lowest quartile of BUN for Recurrence of CSDH
^b Model 1: adjusted for age, sex, current smoking, current alcohol drinking
^c Modal 2: adjusted for covariates from Model 1 and further adjusted for medical history (coronary heart disease, diabetes mellitus, hypertension) and medicine (Atorvastatin and PAMBA)
^d Modal 3: adjusted for covariates from Model 2 and further adjusted for Platelet, Fibrinogen, Leukocyte, Erythrocyte, Hemoglobin, Cr

ISSN: 1471-2377