Table 5
Rate of glaucomatous optic neuropathy, subdivided according to mean gonioscopic width*
| Mean angle width | Total | |||||
|---|---|---|---|---|---|---|
| 0° | 10° | 20° | 30° | ⩾40° | ||
| * Mean gonioscopic width calculated by adding Shaffer grade in each of four quadrants and dividing by 4; 0 = 0 in all quadrants, 1 = 0.25–1.25, 2 = 1.5–2.25, 3 = 2.5–3.25, 4 = 3.5–4. | ||||||
| Eyes having previous intraocular surgery and secondary pathology such as iris neovascularisation were excluded. | ||||||
| The Singapore cohort were selected to include proportionally more elderly subjects than are found in the national population (not using probably proportional to size sampling), and hence the rate of glaucoma does not correspond to a population prevalence. | ||||||
| Mongolia | ||||||
| Number with GON | 1 | 6 | 0 | 4 | 2 | 13 |
| % Rate of GON (95% CI) | 100% (21 to 100) | 11.8% (5.5 to 23.4) | 0.0% (0 to 2.9) | 1.1% (0.4 to 2.9) | 0.5% (0.1 to 1.9) | 1.4% (0.8 to 2.4) |
| Singapore | ||||||
| Number with GON | 0 | 2 | 1 | 3 | 4 | 10 |
| % Rate of GON (95% CI) | 2.0% (0.6, 7.1) | 0.3% (0.1, 1.9) | 0.9% (0.3 to 2.5) | 1.5% (0.6 to 3.9) | 1.0% (0.5 to 1.8) | |
