Table 2.

Percentage of positive LA results in pre- and post-filtration patients' samples.

	dRVVT		SCT		dRVVT and/or SCT
	Screen ratio	Screen ratio/confirm ratio	Screen ratio	Screen ratio/confirm ratio	Screen ratio	Screen ratio/confirm ratio
Rivaroxaban
Pre-filtration	38/38 (100%)	35/38 (92%)	18/36 (50%)	10/36 (28%)	36/36 (100%)	33/36 (92%)
Post-filtration	6/38 (16%)	6/38 (16%)	3/36 (8%)	3/36 (8%)	7/36 (19%)	7/36 (19%)
Apixaban
Pre-filtration	36/39 (92%)	28/39 (72%)	25/39 (64%)	16/39 (41%)	37/39 (95%)	30/39 (77%)
Post-filtration	18/39 (46%)	16/39 (41%)	10/39 (26%)	7/39 (18%)	22/39 (56%)	20/39 (51%)

Positive result corresponds to a ratio ≥ 1.20. dRVVT, dilute Russell viper venom time; SCT, silica clotting time.