. Author manuscript; available in PMC: 2010 May 11.

Published in final edited form as: Pediatr Blood Cancer. 2007 Sep;49(3):318–322. doi: 10.1002/pbc.21142

TABLE II.

Classification of TCD results at the two examinations used to estimate intra-individual variation. Normal: TCD velocity <170 cm/sec; conditional: TCD velocity 170–199 cm/sec; abnormal: TCD velocity ≥200 cm/sec.

FIRST TCD	SECOND TCD
FIRST TCD	NORMAL	CONDITIONAL	ABNORMAL	TOTAL
NORMAL	136	21	2	159
CONDITIONAL	150	195	56	401
ABNORMAL	12	66	174	252
TOTAL	298	282	232	812