Risk factors for deep vein thrombosis even using low-molecular-weight heparin after total knee arthroplasty

Table 3 Single-variable analysis results of factors for the development of deep vein thrombosis in unilateral cases

Factor		Positive	Negative	p value
Deep vein thrombosis		15	74
Gender	Male	4	7	0.085^*a
Gender	Female	11	67	0.085^*a
Age (years)	< 65	2	19	0.592^**
	≥ 65 to < 75	12	33
	≥ 75	1	22
Body mass index (kg/m²)	< 25	3	33	0.021^**a
	≥ 25 to < 30	8	35
	≥ 30	4	6
Type of anesthesia	Epidural	3	35	0.084^*a
Type of anesthesia	General	12	39	0.084^*a
Hypertension	+	12	44	0.156^*a
Hypertension	–	3	30	0.156^*a
Diabetes	+	3	19	0.754^*
Diabetes	–	12	55	0.754^*
Hypercholesterolemia	+	3	7	0.363^*
Hypercholesterolemia	–	12	67	0.363^*
Prothrombin time/international normalized ratio	< 0.95	4	27	0.877^**
	≥ 0.95 to < 1.00	5	20
	≥ 1.00 to < 1.05	4	16
	≥ 1.05	2	11