Table 4.

Baseline retinal nerve fiber layer (RNFL) thickness from African descent and European descent individuals within diagnostic groups

	Healthy eyes				Glaucoma suspect eyes				Glaucoma eyes				ANOVA*
	AD	ED	Total	P- value	AD	ED	Total	P- value	AD	ED	Total	P- value	P- value
Global RNFL (um)	96.1 ± 11.5	96.1 ± 12.1	96.1 ± 11.7	0.50	90.2 ± 12.6	88.5 ± 10.9	89.35 ± 11.3	0.28	72.0 ± 17.8	73.4 ± 20.9	72.7 ± 19.1	0.31	<0.001
Nasal RNFL (um)	75 ± 14.9	75.9 ± 13.4	75.45 ± 13.9	0.59	68.4 ± 13.9	67.1 ± 12.7	67.75 ± 13.2	0.32	59.9 ± 16.2	60.9 ± 21.3	60.4 ± 18.5	0.63	<0.001
Temporal RNFL (um)	62.1 ± 11.9	66 ± 13.1	64 ± 12.7	0.07	64.9 ± 12.4	67.0 ± 11.7	65.95 ± 11.92	0.09	55.7 ± 11.9	59.0 ± 16.7	57.35 ± 12.33	0.07	<0.001
Inferior RNFL (um)	127.2 ± 19.1	123.7 ± 18.0	125.95 ± 18.7	0.14	116.4 ± 20.9	112.6 ± 17.5	114.7 ± 18.9	0.12	85.4 ± 32.7	88.2 ± 31.6	86.8 ± 31.97	0.27	<0.001
Superior RNFL (um)	117.5 ± 18.3	116.6 ± 17.7	117.01 ± 18.2	0.4	111.1 ± 19.5	107.3 ± 17.9	109.4 ± 18.2	0.08	87.4 ± 23.6	85.7 ± 27.0	86.55 ± 25.12	0.65	<0.001

Abbreviations: RNFL, retinal nerve fiber layer. All values are mean (±SD) and Wilcoxon rank sum test P-values reported representing the differences between AD and ED eyes.

^*P-values represent differences across diagnostic groups.