Table 2. OSDI subscale score and total score.
| Groups | OSDI-symptoms score | OSDI-function score | OSDI-triggers score | Total OSDI score |
| Control group | 7.31±3.52 | 2.69±1.30 | 5.12±1.79 | 4.00±1.44 |
| NDR group | 15.28±3.84 | 6.90±2.71 | 6.94±3.81 | 9.96±2.14 |
| NPDR group | 22.63±3.94 | 29.17±6.36 | 7.64±3.15 | 16.15±2.25 |
| PDR group | 16.21±3.13 | 71.21±5.03 | 8.23±2.39 | 32.81±2.87 |
| F/H | 8.352 | 40.5 | 1.527 | 29.314 |
| P | <0.05 | <0.01 | 0.676 | <0.01 |
NDR: No diabetic retinopathy; NPDR: Non-proliferative diabetic retinopathy; PDR: Proliferative diabetic retinopathy; OSDI: Ocular Surface Disease Index.
mean±SD