Table 4.

Magnitude of diurnal variation of RVD and hemodynamic parameters between healthy subjects and low-teens NTG.

	Healthy group (N = 32)	Low-teens NTG (N = 35)	P-value*
ΔMax.in peripapillary RVD (%)
Average	2.64 ± 1.55	3.85 ± 2.83	0.017
ONH	6.83 ± 3.90	10.43 ± 8.57	0.005
pSuperior	5.61 ± 3.29	9.85 ± 10.44	0.015
pInferior	7.03 ± 4.84	11.68 ± 9.67	0.008
pTemporal	6.72 ± 4.89	8.07 ± 4.38	0.216
pNasal	5.92 ± 3.92	8.90 ± 9.01	0.080
ΔMax.in macular RVD (%)
Average	3.38 ± 2.43	4.92 ± 3.83	0.036
Fovea	5.54 ± 7.22	4.44 ± 4.87	0.450
mSuperior	6.18 ± 4.30	7.13 ± 4.41	0.347
mInferior	7.35 ± 5.80	7.90 ± 4.78	0.658
mTemporal	5.59 ± 4.40	5.46 ± 5.49	0.910
mNasal	5.09 ± 3.93	8.38 ± 6.49	0.007
ΔMax.in hemodynamics (mmHg)
SBP	16.38 ± 7.90	20.43 ± 19.20	0.218
DBP	12.65 ± 7.17	16.90 ± 7.35	0.013
IOP	2.69 ± 1.46	2.71 ± 1.38	0.963
MOPP	7.14 ± 4.43	9.57 ± 5.27	0.025

*Independent t-test, bolded values represent significance, P < 0.05.

RVD = retinal vessel density; ONH = optic nerve head; SBP = systolic blood pressure; DBP = diastolic blood pressure; IOP = intraocular pressure; MOPP = mean ocular perfusion pressure.