Table 1.

Prevalence of Epiretinal Membranes in the Multi-Ethnic Study of Atherosclerosis population.

		Any ERM				Primary ERM				Secondary ERM
		Any ERM	CMR	PMF		Any ERM	CMR	PMF		Any ERM	CMR	PMF
	N	n (%)	n (%)	n (%)	N	n (%)	n (%)	n (%)	N	n (%)	n (%)	n (%)
Total Cohort	5960	1722 (28.9)	1494 (25.1)	228 (3.8)	4761	1241 (26.1)	1083 (22.7)	158 (3.3)	1199	481 (40.1)	411 (34.3)	70 (5.8)
Age, years
45–54	1429	191 (13.4)	179 (12.5)	12 (0.8)	1281	169 (13.2)	158 (12.3)	11 (0.9)	148	22 (14.9)	21 (14.2)	1 (0.7)
55–64	1792	437 (24.4)	384 (21.4)	53 (3.0)	1531	365 (23.8)	319 (20.8)	46 (3.0)	261	72 (27.6)	65 (24.9)	7 (2.7)
65–74	1825	736 (40.3)	618 (33.9)	118 (6.5)	1420	545 (38.4)	462 (32.5)	83 (5.8)	405	191 (47.2)	156 (38.5)	35 (8.6)
≥75	914	358 (39.2)	313 (34.2)	45 (4.9)	529	162 (30.6)	144 (27.2)	18 (3.4)	385	196 (50.9)	169 (43.9)	27 (7.0)
p for trend		<0.001	<0.001	<0.001		<0.001	<0.001	<0.001		<0.001	<0.001	<0.001
Gender
Men	2852	850 (29.8)	743 (26.1)	107 (3.8)	2263	604 (26.7)	532 (23.5)	72 (3.2)	589	246 (41.8)	211 (35.8)	35 (5.9)
Women	3108	872 (28.1)	751 (24.2)	121 (3.9)	2498	637 (25.5)	551 (22.1)	86 (3.4)	610	235 (38.5)	200 (32.8)	35 (5.7)
P		0.14	0.10	0.93		0.38	0.25	0.70		0.44	0.25	0.72
Race/ethnicity
Whites	2348	645 (27.5)	557 (23.7)	88 (3.7)	1890	472 (25.0)	413 (21.9)	59 (3.1)	458	173 (37.8)	144 (31.4)	29 (6.3)
Blacks	1606	421 (26.2)	393 (24.5)	28 (1.7)	1266	288 (22.7)	268 (21.2)	20 (1.6)	340	133 (39.1)	125 (36.8)	8 (2.4)
Hispanics	1298	380 (29.3)	325 (25.0)	55 (4.2)	1039	271 (26.1)	231 (22.2)	40 (3.8)	259	109 (42.1)	94 (36.3)	15 (5.8)
Chinese	708	276 (39.0)	219 (30.9)	57 (8.1)	566	210 (37.1)	171 (30.2)	39 (6.9)	142	66 (46.5)	48 (33.8)	18 (12.7)
p		<0.001	<0.001	<0.001		<0.001	<0.001	<0.001		0.61	0.48	<0.001

ERM: epiretinal membrane; CMR: cellophane macular reflex; PMF: pre-retinal macular fibrosis