Table 2.

Comparison of factor VIII inhibitor results in Nijmegen-Bethesda units (NBU) on heated and unheated specimens

	NBU Pre Heating	NBU Post Heating n (%)
		0	0.1-0.4	0.5-0.9	≥1.0	All
Negative History of Inhibitor n=159	0	45 (37.5)	74 (61.7)	1 (0.8)	0	120
	0.1-0.4	6 (16.2)	31 (83.8)	0	0	37
	0.5-0.9	0	0	1 (100)	0	1
	≥1.0	0	0	0	1(100)	1
Positive History of Inhibitor n=43	0	4 (44.4)	5 (55.6)	0	0	9
	0.1-0.4	2 (9.5)	14 (66.7)	5 (23.8)	0	21
	0.5-0.9	0	0	2 (100)	0	2
	≥1.0	0	0	0	11 (100)	11
Normals n=30	NA	20 (66.7)	10 (33.3)	0	0	30