Table 3.

Diurnal distributions of RVD (%) and hemodynamic parameters for each measurement session with ANOVA P values.

	Healthy group (N = 32)					Low-teens NTG (N = 35)
	9AM	12PM	3 PM	6 PM	*P value	9AM	12PM	3 PM	6 PM	*P value
Peripapillary RVD	51.98 ± 3.33	51.87 ± 3.86	52.30 ± 4.25	53.19 ± 3.26	0.856	47.09 ± 5.30	47.71 ± 5.04	47.06 ± 4.86	47.44 ± 5.00	0.532
ONH	38.77 ± 7.98	39.58 ± 8.30	39.88 ± 8.02	40.99 ± 7.20	0.666	30.24 ± 12.37	30.09 ± 12.65	28.80 ± 11.05	32.64 ± 11.21	0.130
pSuperior	61.33 ± 5.82	61.12 ± 5.94	60.51 ± 6.62	61.07 ± 6.21	0.269	56.17 ± 6.62	57.58 ± 9.00	54.17 ± 11.41	55.66 ± 5.80	0.018
pInferior	62.59 ± 5.99	61.95 ± 6.66	63.20 ± 7.15	66.06 ± 5.28	0.008	55.31 ± 10.16	55.29 ± 9.55	54.99 ± 6.54	55.99 ± 9.28	0.615
pTemporal	49.37 ± 6.46	47.84 ± 7.52	48.72 ± 7.87	49.48 ± 6.41	0.101	48.79 ± 7.06	47.53 ± 7.04	48.42 ± 7.34	46.99 ± 7.06	0.326
pNasal	47.85 ± 5.99	48.86 ± 5.49	49.18 ± 5.91	48.33 ± 6.66	0.782	44.95 ± 11.08	48.03 ± 8.53	48.95 ± 7.26	45.93 ± 8.74	0.732
Macular RVD	40.28 ± 3.35	39.86 ± 2.55	40.78 ± 3.51	40.80 ± 2.89	0.205	40.17 ± 3.32	41.03 ± 3.54	40.99 ± 3.27	40.72 ± 2.66	0.582
Fovea	14.47 ± 5.28	14.91 ± 4.80	15.72 ± 7.99	14.38 ± 4.45	0.514	14.62 ± 4.31	15.60 ± 6.37	15.63 ± 5.51	14.33 ± 4.02	0.647
mSuperior	48.27 ± 6.18	47.28 ± 4.09	47.92 ± 4.23	49.16 ± 4.38	0.455	48.62 ± 5.48	50.20 ± 5.47	48.24 ± 4.97	49.66 ± 4.13	0.184
mInferior	49.92 ± 5.52	47.82 ± 4.75	50.68 ± 6.06	48.32 ± 4.60	0.124	45.36 ± 7.56	47.75 ± 6.58	48.61 ± 6.15	47.34 ± 6.70	0.022
mTemporal	45.59 ± 5.25	45.58 ± 3.43	45.69 ± 4.08	47.44 ± 4.35	0.534	46.72 ± 4.71	45.96 ± 5.12	46.04 ± 4.03	45.50 ± 5.26	0.015
mNasal	43.16 ± 5.87	43.73 ± 3.99	44.11 ± 5.11	44.69 ± 4.62	0.949	45.52 ± 8.71	45.65 ± 5.78	46.41 ± 5.56	46.75 ± 5.39	0.484
SBP (mmHg)	125.21 ± 13.78	125.79 ± 11.74	125.86 ± 11.66	126.24 ± 12.53	0.743	131.06 ± 15.74	126.09 ± 15.28	128.53 ± 13.85	125.94 ± 23.58	0.294
DBP (mmHg)	78.79 ± 11.38	78.29 ± 10.75	78.70 ± 9.98	79.33 ± 9.57	0.691	78.29 ± 11.01	75.79 ± 10.56	76.35 ± 7.98	69.79 ± 10.04	0.002
IOP (mmHg)	14.55 ± 2.06	14.05 ± 2.53	13.88 ± 2.29	14.37 ± 2.50	0.476	14.03 ± 1.87	13.71 ± 1.66	13.71 ± 1.53	14.56 ± 2.13	0.163
MOPP (mmHg)	53.47 ± 8.05	53.02 ± 7.03	53.84 ± 7.03	54.16 ± 6.85	0.575	53.22 ± 7.19	52.39 ± 6.15	52.93 ± 5.65	50.06 ± 6.90	0.017

* Repeated-measures ANOVA; 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.