Table 4.

Correlations between changes in retrobulbar blood flow velocity with changes in optic nerve head morphology in OAG patients of African and European descent. OAG: open-angle glaucoma. With permission from the publisher and authors (Siesky et al., 2016).

Technique	Measurement	NPCA
		RI					EDV
		AD		ED		Comparison AD vs. ED	AD		ED		Comparison AD vs. ED
		r	p	r	p	p	r	p	r	p	p
OCT	Cup area	0.63	0.01	−0.01	0.92	0.01	−0.57	0.02	0.04	0.78	0.02
	Rim area	−0.68	0.00	−0.12	0.36	0.02	0.63	0.01	0.14	0.31	0.05
	Cup/Disc area ratio	0.76	0.00	−0.05	0.71	0.00	−0.72	0.00	0.02	0.86	0.00
	Cup/Disc horizontal ratio	0.62	0.01	0.09	0.51	0.04	−0.69	0.00	−0.09	0.48	0.01
	Cup/Disc vertical ratio	0.74	0.00	−0.06	0.66	0.00	−0.73	0.00	0.09	0.52	0.00
	RNFLT	−0.43	0.07	−0.07	0.62	0.17	0.35	0.15	−0.03	0.84	0.17
HRT−III	Cup area	0.64	0.00	−0.05	0.68	0.00	−0.47	0.05	0.08	0.57	0.05
	Rim area	−0.60	0.01	0.04	0.79	0.01	0.52	0.03	−0.02	0.87	0.04
	Rim Volume	−0.60	0.01	−0.01	0.93	0.02	0.47	0.05	0.02	0.89	0.09
	Cup/Disc area ratio	0.76	0.00	−0.03	0.82	0.00	−0.61	0.01	0.01	0.93	0.01
	Linear cup/disc ratio	0.76	0.00	−0.05	0.70	0.00	−0.61	0.01	0.04	0.79	0.01
	RNFLT	−0.53	0.02	0.02	0.88	0.04	0.44	0.07	0.00	0.99	0.10
		TPCA
		RI					EDV
		AD		ED		Comparison AD vs. ED	AD		ED		Comparison AD vs. ED
		r	p	r	p	p	r	p	r	p	p
OCT	Cup area	−0.55	0.02	0.26	0.04	0.00	−0.39	0.13	0.18	0.18	0.04
	Rim area	0.46	0.06	0.03	0.82	0.12	0.40	0.11	0.11	0.40	0.30
	Cup/Disc area ratio	−0.55	0.02	0.06	0.64	0.02	−0.44	0.08	−0.04	0.76	0.15
	Cup/Disc horizontal ratio	−0.58	0.01	0.12	0.35	0.01	−0.46	0.06	0.02	0.86	0.08
	Cup/Disc vertical ratio	−0.55	0.02	0.13	0.32	0.01	−0.44	0.08	0.10	0.44	0.05
	RNFLT	0.25	0.32	0.06	0.64	0.50	0.18	0.48	−0.11	0.43	0.32
HRT−III	Cup area	−0.29	0.26	0.09	0.49	0.18	−0.50	0.04	0.11	0.40	0.02
	Rim area	0.23	0.35	−0.01	0.92	0.38	0.31	0.22	−0.05	0.72	0.21
	Rim volume	0.36	0.14	−0.01	0.95	0.18	0.39	0.11	−0.08	0.54	0.09
	Cup/Disc area ratio	−0.38	0.12	−0.02	0.91	0.20	−0.57	0.01	0.05	0.71	0.02
	Linear cup/disc ratio	−0.41	0.09	−0.04	0.79	0.16	−0.61	0.01	0.05	0.72	0.01
	RNFLT	0.40	0.10	0.12	0.37	0.29	0.50	0.03	−0.08	0.55	0.03

Bold P-values indicate statistical significance (p < 0.05).

Table 3 legend: AD–African descent; ED–European descent; EDV–end diastolic velocity; HRT-III–Heidelberg retinal tomography-III; NPCA–nasal posterior ciliary artery; OAG–open angle glaucoma; OCT–optical coherence tomography; r-correlation coefficient; RI–resistive index; RNFLT-retinal nerve fiber layer thickness; TPCA–temporal posterior ciliary artery