Distribution of corneal signs within the ethnic groups
| All patients | White | Asian | Middle East | p Value* | |
|---|---|---|---|---|---|
| No (%) | No (%) | No (%) | No (%) | ||
| *Fisher’s exact test; NS, not statistically significant. | |||||
| Number of patients | 44 | 20 | 22 | 2 | – |
| Severity of disease | |||||
| Mild | 21 (47.7) | 18 (90.0) | 3 (13.6) | 0 (0) | <0.001 |
| Moderate | 11 (25.0) | 2 (10.0) | 9 (40.9) | 0 (0) | 0.03 |
| Severe | 12 (27.2) | 0 (0) | 10 (45.5) | 2 (100)) | <0.001 |
| Punctate erosions | 4 (9.1) | 0 (0) | 4 (18.2) | 0 (0) | NS |
| Epithelial punctate keratitis | 26 (59.1) | 11 (55) | 13 (59.1) | 2 (100) | NS |
| Subepithelial punctate keratitis | 28 (63.6) | 8 (40) | 18 (81.8) | 2 (100) | 0.008 |
| Vascularisation | 27 (61.4) | 6 (30) | 19 (86.4) | 2 (100) | <0.001 |
| Sectoral | 15 (34.1) | 6 (30) | 9 (40.9) | 0 (0) | NS |
| Circumcorneal | 12 (27.2) | 0 (0) | 10 (45.5) | 2 (100)) | <0.001 |
| Marginal infiltrates | 28 (63.6) | 12 (60) | 14 (63.6) | 2 (100) | NS |
| Marginal ulcers | 4 (9.1) | 0 (0) | 2 (9.1) | 2 (100) | 0.003 |
| Corneal plyctenules | 2 (4.6) | 0 (0) | 2 (9.1) | 0 (0) | NS |