Study population | Examined (response rate %) | Prevalence of glaucoma | Undiagnosed glaucoma (%) | Proportion blind (%) | Reference | ||
---|---|---|---|---|---|---|---|
n | All glaucoma % (95 % CI) | 40–49 years age-specific | |||||
Nigeria, National | 13,951 (90) | 682 | 5.0 (4.6–5.5) | 1.9 (1.6–2.3) | 94 | 20 | This study |
Africa | |||||||
 Kongwa, Tanzania | 3247 (89) | 135 | 4.2 (3.5–4.9) | 1.7 (1.1–2.5) | 98 | 14 | [18] |
 Hlabisa, South Africa | 1005 (90) | 41 | 4.5 (3.2–6.1) | 1.2 (0.2–3.4) | 90 |  | [19] |
 Temba, South Africa | 839 (75) | 55 | 5.3 (3.9–7.1) | 1.1b | 87 |  | [20] |
 Tema, Ghana | 5603 (82) | 32 | 6.5 (5.8–7.1) | 3.2 (2.7–4.1) | 97 | 3 | [21] |
 Akinyele, Nigeria | 811 (90) | 59 | 7.3 (5.5–9.1) | 4.6 (2.1–7.1) | 90 | 6 | [22] |
Asia | |||||||
 Qatar | 3149 (97) | 67 | 1.7 (1.7–1.8) | 1.45 b | 51 | 6 | [48] |
 Yazd, Iran | 1990 (86) | 87 | 4.4 (3.3–5.4) | 1.6 (0.8–2.4) | 90 |  | [46] |
 Chinese, Singapore | 1232 (72) | 45 | 3.2 (2.3–4.1)a | 1.1 (0.2–4.8) | 62 |  | [31] |
 Chinese, Singapore | 3353 (73) | 134 | 3.2 (2.7–3.9)a | 0.7 b | 85 | 10 | [38] |
 Malay, Singapore | 3280 (79) | 150 | 3.4 (3.3–3.5)a | 2.2 b | 92 | 10 | [36] |
 Indian, Singapore | 3400 (76) | 78 | 1.9 (1.5–2.5)a | 1.3 b | 72 | 10 | [35] |
 Beijing, China | 4439 (83) | 158 | 3.7 (3.1–4.2) | 2.2 (1.5–3.0) | - | 2 | [37] |
 Kailu, China | 5197 (87) | 169 | 2.9 (2.0–3.8)a | 2.0 (1.3–2.7) | 66 | 7 | [32] |
 Bhaktapur, Nepal | 3991 (83) | 75 | 1.8 (1.7–1.9)a | 0.3 b | 96 | 2 | [33] |
 Central India | 4711 (80) | 122 | 3.5 (2.8–4.1) | 1.0 (0.5–1.6) | – | 1 | [34] |
Australia | |||||||
 Indigenous, Australia | 1061 (64) | 26 | 2.2 (1.6–3.6) | 1.5 (0.4–2.5) | 81 | 12 | [47] |
Europe | |||||||
 Ponza, Italy | 1034 (84) | 39 | 3.8b | 0 (0.0–1.7) | – |  | [42] |
 Egna-Neumarkt, Italy | 4297 (74) | 121 | 2.9b approx | 0.5 b | – |  | [41] |
 Wroclaw, Poland | 4853 (83) | 79 | 1.6 (1.3–2.0) | 0.4 (0.1–1.1) | 71 |  | [44] |