Table 2 Crude prevalence of bilateral low vision and blindness based on best-corrected visual acuity (BCVA) or presenting visual acuity (PVA) by gender and age in type 2 diabetes patients in the Dongguan Eye Study.
Group | Age | Total No. of persons | Based on BCVA | Based on PVA | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
Bilateral low vision (20/400 ≤BCVA < 20/63) | Bilateral blindness (BCVA < 20/400) | Bilateral low vision (20/400 ≤ PVA < 20/63) | Bilateral blindness (PVA < 20/400) | |||||||
No. of persons | % (95% CI) | No. of persons | % (95% CI) | No. of persons | % (95% CI) | No. of persons | % (95% CI) | |||
Male | ||||||||||
40–49 | 156 | 0 | 0 | 0 | 0 | 1 | 0.6 (0–1.9) | 0 | 0 | |
50–59 | 168 | 0 | 0 | 1 | 0.6 (0–1.8) | 4 | 2.4 (0.1–4.7) | 1 | 0.6 (0–1.8) | |
60–69 | 158 | 2 | 1.3 (0–3.0) | 1 | 0.6 (0–1.9) | 5 | 3.2 (0.4–5.9) | 1 | 0.6 (0–1.9) | |
70–79 | 46 | 2 | 4.3 (0–10.3) | 1 | 2.2 (0–6.4) | 11 | 23.9 (11.4–36.4) | 1 | 2.2 (0–6.4) | |
≥80 | 22 | 5 | 22.7 (4.8–40.7) | 2 | 9.1 (0–21.4) | 6 | 27.3 (8.2–46.4) | 2 | 9.1 (0–21.4) | |
total | 550 | 9 | 1.6 (0.6–2.7) | 5 | 0.9 (0.1–1.7) | 27 | 4.9 (3.1–6.7) | 5 | 0.9 (0.1–1.7) | |
Female | ||||||||||
40–49 | 140 | 0 | 0 | 0 | 0 | 4 | 2.9 (0.1–5.6) | 0 | 0 | |
50–59 | 222 | 1 | 0.5 (0–1.3) | 0 | 0 | 6 | 2.7 (0.6–4.8) | 0 | 0 | |
60–69 | 261 | 3 | 1.1 (0–2.4) | 0 | 0 | 17 | 6.5 (3.5–9.5) | 1 | 0.4 (0–1.1) | |
70–79 | 131 | 17 | 13.0 (7.2–18.8) | 0 | 0 | 40 | 30.5 (22.6–38.5) | 0 | 0 | |
≥80 | 40 | 8 | 18.2 (6.6–29.7) | 4 | 9.1 (0.5–17.7) | 15 | 34.1 (19.9–48.3) | 5 | 11.4 (1.9–20.9) | |
total | 798 | 29 | 3.6 (2.3–4.9) | 4 | 0.5 (0–1.0) | 82 | 10.3 (8.2–12.4) | 6 | 0.8 (0.2–1.4) | |
Male and female | ||||||||||
40–49 | 296 | 0 | 0 | 0 | 0 | 5 | 1.7 (0.2–3.2) | 0 | 0 | |
50–59 | 390 | 1 | 0.3 (0–0.8) | 1 | 0.3 (0–0.8) | 10 | 2.6 (1.0–4.1) | 1 | 0.3 (0–0.8) | |
60–69 | 419 | 5 | 1.2 (0.2–2.2) | 1 | 0.2 (0–0.7) | 22 | 5.3 (3.1–7.4) | 2 | 0.5 (0–1.1) | |
70–79 | 177 | 19 | 10.7 (6.2–15.3) | 1 | 0.6 (0–1.7) | 51 | 28.8 (22.1–35.5) | 1 | 0.6 (0–1.7) | |
≥80 | 66 | 13 | 19.7 (10.0–29.4) | 6 | 9.1 (2.1–16.1) | 21 | 31.8 (20.5–43.2) | 7 | 10.6 (3.1–18.1) | |
total | 1348 | 38 | 2.8 (1.9–3.7) | 9 | 0.7 (0.2–1.1) | 109 | 8.1 (6.6–9.5) | 11 | 0.8 (0.3–1.3) | |
