Neutrophil-Lymphocyte Ratio in Predicting Infective Endocarditis: A Case-Control Retrospective Study

Table 1

Clinical and hematologic data of study population.

Characteristics		Patients ()	Controls ()	value
Age (years)				0.86
Sex (man/female)		463/215	1630/890	0.08
Comorbid conditions and predisposing factors	Rheumatic heart disease	95 (14.01%)
	Congenital heart disease	85 (12.54%)
	Sepsis	35 (5.16%)
	Hypertension	39 (5.75%)
	Brain disease	9 (1.33%)
	Coronary artery disease	74 (10.91%)
	Nephropathy	84 (12.39%)
	Diabetes	95 (14.01%)
	Pulmonary infection	12 (1.77%)
	Cardiac insufficiency	124 (18.29%)
Pathogens (no. (%))	Culture positive	230 (33.92%)
	Culture negative	448 (66.08%)
	Gram-positive bacteria	202 (86.70%)
	Gram-negative bacteria	16 (6.87%)
	Fungus	15 (6.43%)
Inflammatory markers	NEU			<0.001
	LYM			0.67
	NLR			<0.001
	PCT (μg/L)
	CRP (mg/L)

NLR: neutrophil-lymphocyte ratio; PCT: procalcitonin; CRP: C-reactive protein; NEU: neutrophils; LYM: lymphocytes.