Age groups (years) | All ages | |||||||
---|---|---|---|---|---|---|---|---|
50–59 case (%) | 60–69 case (%) | 70–79 case (%) | 80+ case (%) | p for age trend | Males case (%) | Females case (%) | Total case (%) | |
All ERM | n=757 | n=672 | n=355 | n=221 | n=877 | n=1128 | n=2005 | |
CMR | 11 (1.5) | 35 (5.2) | 31 (8.7) | 24 (10.9) | <0.001 | 31 (3.5) | 70 (6.2) | 101 (5.0) |
2.8 (1.7–3.9)* | 5.7 (4.4–7.1)* | 4.3 (3.4–5.2)* | ||||||
PMF | 12 (1.6) | 31 (4.6) | 14 (3.9) | 11 (5.0) | 0.005 | 27 (3.1) | 41 (3.6) | 68 (3.4) |
2.6 (1.5–3.7)* | 3.5 (2.4–4.5)* | 3.0 (2.3–3.8)* | ||||||
Any ERM signs | 23 (3.0) | 66 (9.8) | 45 (12.6) | 35 (15.8) | <0.001 | 58 (6.6) | 111 (9.8) | 169 (8.4) |
5.4 (3.9–6.9)* | 9.2 (7.5–10.9)* | 7.3 (6.2–8.5)* | ||||||
Idiopathic ERM | n=742 | n=630 | n=311 | n=171 | n=805 | n=1049 | n=1854 | |
CMR | 11 (1.5) | 29 (4.6) | 26 (8.4) | 19 (11.1) | <0.001 | 26 (3.2) | 59 (5.6) | 85 (4.6) |
PMF | 12 (1.6) | 28 (4.4) | 11 (3.5) | 7 (4.1) | 0.029 | 22 (2.7) | 36 (3.4) | 58 (3.1) |
Any ERM signs | 23 (3.1) | 57 (9.0) | 37 (11.9) | 26 (15.2) | <0.001 | 48 (6.0) | 95 (9.1) | 143 (7.7) |
Secondary ERM† | n=15 | n=42 | n=44 | n=50 | n=72 | n=79 | n=151 | |
CMR | 0 | 6 (14.3) | 5 (11.4) | 5 (10.0) | NA | 5 (6.9) | 11 (13.9) | 16 (10.6) |
PMF | 0 | 3 (7.1) | 3 (6.8) | 4 (8.0) | NA | 5 (6.9) | 5 (6.3) | 10 (6.6) |
Any ERM signs | 0 | 9 (21.4) | 8 (18.2) | 9 (18.0) | NA | 10 (13.2) | 16 (20.3) | 26 (17.2) |
*Standardised by the age and gender to the 2010 Chinese census population.
†Secondary ERM was defined as having ERM in eyes with retinal vein occlusion, diabetic retinopathy, late age-related macular degeneration, retinal detachment, or history of cataract surgery.
CMR, cellophane macular reflex; ERM, epiretinal membrane; NA, not available; PMF, preretinal macular fibrosis.