Table 2 Comparison of basic clinical characteristics between subclinical, abnormal and control groups (mean ± standard deviation, um)
| Subjects (eyes) | Control group 60 (118) | Subclinical group 50 (98) | Abnormal group 14 (28) | P valuea |
|---|---|---|---|---|
| Sex (M/F eyes) | 32/28 | 26/24 | 8/6 | 0.943 |
| Age (y) | 48.41 ± 15.86 | 45.05 ± 15.81 | 51.00 ± 21.02 | 0.187 |
| EMB duration (mo) | – | 5.6 ± 4.04 | 8.0 ± 2.94 | 0.036b |