Table 1. Doppler ultrasound parameter mean values for examined arteries in patients with and without early dysthyroid optic neuropathy (eDON).

		Group
Artery	Doppler ultrasound parameter	eDON (Δ±SD)	No eDON (Δ±SD)	t-value†	p-value
ICA	SFV	360.74±55.87	352.06±88.00	-0.33	0.74
	DFV	100.83±41.39	112.21±26.60	1.00	0.32
	VMEAN	230.78±42.39	232.17±54.02	0.08	0.93
	RI	0.68±0.06	0.72±0.10	1.82	0.07
	PI	1.03±0.13	1.15±0.24	1.99	0.05
OA	SFV	328.86±80.31	396.96±81.61	2.48	0.01
	DFV	68.70±28.15	89.12±34.24	1.89	0.06
	VMEAN	198.76±50.68	247.74±57.13	2.65	0.01
	RI	0.78±0.06	0.79±0.06	0.64	0.52
	PI	1.26±0.17	1.32±0.16	0.98	0.33
CRA	SFV	235.82±58.04	300.39±74.91	2.79	0.01
	DFV	44.11±18.52	70.29±21.61	3.80	<0.001
	VMEAN	139.97±36.10	170.38±58.72	1.78	0.08
	RI	0.76±0.05	0.82±0.06	2.69	0.009
	PI	1.94±2.66	1.38±0.17	-0.80	0.43

ICA = internal carotid artery; OA = ophthalmic artery; CRA = central retinal artery; SFV = peak systolic flow velocity; DFV = end diastolic flow velocity; VMEAN = mean flow; RI = resistivity index; PI = pulsatility index; ^†t-Student’s t-test