Clinical profile of the control group, non-DR group, and PDR group
| Control group | Non-DR group | PDR group | p Value | ||||
|---|---|---|---|---|---|---|---|
| Number of patients or mean (SD). | |||||||
| NS = not significant. | |||||||
| The age was compared between each group. | |||||||
| *Comparisons between the non-DR group and the PDR group by unpaired t test. | |||||||
| **Comparisons between the non-DR group and the PDR group χ2 test of independence or Fisher’s exact probability test. | |||||||
| †Age at the time of this study. | |||||||
| ¶Average value over 10 years. | |||||||
| Number of patients | 50 | 45 | 44 | – | |||
| Age (years)† | 27.4 (2.7) | 27.8 (2.8) | 29.2 (4.1) | NS | |||
| Male/female | 25/25 | 20/25 | 20/24 | – | |||
| Age at the diagnosis of diabetes (years) | – | 16.5 (4.3) | 16.7 (3.7) | NS* | |||
| Age at the diagnosis of diabetic retinopathy (years) | – | – | 21.6 (4.5) | – | |||
| Age at the time of vitreous surgery (years) | – | – | 28.8 (4.4) | – | |||
| HbA1C (%) | – | 7.7 (1.6) | 7.9 (1.9) | NS* | |||
| Hypertension (%) | 0 | (0.0%) | 3 | (6.7%) | 4 | (8.3%) | NS** |
| Renal disease (%) | 0 | (0.0%) | 6 | (13.3%) | 15 | (34.1%) | .0021** |
| Neurophysiological neuropathy (%) | 0 | (0.0%) | 9 | (20.0%) | 18 | (40.9%) | .032** |
| Positive family history (%) | 0 | (0.0%) | 15 | (33.3%) | 19 | (43.1%) | NS** |