TABLE 7.

Total UFH dose and aPTT4/0 ratios according to blood compartment volume results.

		Blood compartment volume		p-value1
		<80%	≥80%
		n = 22	n = 65
Total UFH dose	Overall	125 ± 59	133 ± 62	0.6
(IU/kg/session)	AVF/AVG	103 ± 42	86 ± 30	0.2
	catheter	140 ± 66	175 ± 51	0.06
aPTT4/0	Overall	3.1 ± 2.7	3.5 ± 2.7	0.6
	AVF/AVG	1.6 ± 1.3	1.8 ± 1.2	0.7
	catheter	4.2 ± 3.0	5.1 ± 2.8	0.3

Total session dose of unfractionated heparin (UFH) (IU/kg/session) and aPTT4/0 ratio are expressed as mean ± SD according to the loss in blood compartment volume of the dialyzer after use normalized for its original volume.

aPTT, activated partial thromboplastin time; ACT, activated clotting time;

AVF/AVG, arteriovenous fistula/arteriovenous graft.

¹Hypothesis testing of the difference between categories of blood compartment loss using unpaired t-test.