Table 3.

Concordance between TCD diagnoses according to operator vs. published normative values.

	According to the normative values
According to the operator		Hyperemia	Hypoperf.	Asymmetry	Elevated PI	Reverse flow	Normal	ND	Total
	Hyperemia	6 (38%)	1	10	0	0	8	10	35
	Hypoperf.	0	2 (16%)	4	2	1	2	6	16
	Asymmetry	1	1	8 (22%)	1	0	5	0	16
	Elevated PI	0	2	2	3 (43%)	0	3	0	10
	Reverse flow	0	1	1	0	2 (67%)	0	0	4
	Normal	8	4	10	0	0	15 (43%)	31	68
	ND	1	1	2	1	0	2	2	9
	Total	16	12	37	7	3	35	43

Concordance rates are given in brackets. Hypoperf: hypoperfusion. PI: pulsatility index. ND: not documented. Each TCD parameter was defined as low (below 2 standard deviations, SD), normal, or high (greater than 2 standard deviations) according to the literature data (38–41).