Table 1.

% JAK2 V617F obtained using different qPCR assays

EQA1	Larsen (n = 6)		Lippert (n = 5)		Ipsogen (n = 4)		Other* (n = 5)
ddPCR %	Mean %	CV%	Mean %	CV%	Mean %	CV%	Mean %	CV%
30	31	24	31	25	34	10	29	24
16	18	24	17	31	22	19	15	28
7.3	8.6	31	9.9	36	10	21	7.1	41
1.9	2.1	34	1.7	44	2.5	39	0.8	89
EQA2	Larsen incl. modified (n = 22)						Other* (n = 5)
ddPCR %	Mean %	CV%					Mean %	CV%
66	61	14					65	17
22	19	32					22	46
4.6	4.0	44					4.5	51
1.0	0.7	34					0.8	37

*The “other” group does not include the same laboratories and protocols in EQA1 and EQA2