Plasma D-dimer is not useful in the prediction of deep vein thrombosis after total knee arthroplasty in patients using rivaroxaban for thromboprophylaxis

Table 2 Comparison of demographic parameters of patients with and without DVT

	DVT
Variables	Yes	No	p value
	(N = 29)	(N = 171)
Male sex (F/M)	25/4	124/47	0.12
ASA score ≥ 3 [no./total no.(%)]	13/29(44.8%)	61/171(35.7%)	0.35
Age (years)	71.0 ± 6.9	69.0 ± 7.0	0.16
BMI (kg/m²)	26.5 ± 3.9	27.8 ± 3.5	0.07
Obesity (BMI ≥ 27, no.)	15	102	0.42
Pre-operative laboratory data
Hemoglobin (g/dl)	12.6 ± 0.9	13.4 ± 1.1	< 0.01
Platelet count (10⁹cells/L)	249.2 ± 59.8	228.7 ± 55.1	0.27
PT INR	1.0 ± 0.04	1.0 ± 0.6	0.67
aPTT INR	1.0 ± 0.1	1.0 ± 0.1	0.28
Types of anesthesia (no.)			0.61
General anesthesia	25	139
Spinal anesthesia	4	32
Total blood loss (ml)	989.8 ± 300.3	1056.6 ± 335.7	0.32
Blood transfusion	0/29(0%)	8/171(4.7%)	0.61

All data are expressed as mean ± standard deviation
ASA American Society of Anesthesiologists, BMI Body mass index, INR International normalized ratio, PT Prothrombin time, aPTT Activated partial thromboplastin time

ISSN: 1749-799X