Table 1.
Baseline characteristics, according to the gradability of retinal photograph
| Characteristics | Gradable | Ungradable | P value |
|---|---|---|---|
| n | 944 | 215 | |
| Sex (% male) | 47.0 | 42.8 | 0.260 |
| Pubertal stage (%) | |||
| 1 | 5.4 | 4.6 | 0.450 |
| 2 | 11.9 | 13.8 | |
| 3 | 16.1 | 10.9 | |
| 4 | 25.4 | 28.7 | |
| 5 | 41.1 | 42.0 | |
| Age (years) | 14.1 ± 0.05 | 13.9 ± 0.10 | 0.023 |
| BMI (kg/m2) | 21.9 ± 0.11 | 21.8 ± 0.23 | 0.902 |
| SBP (mmHg) | 111.9 ± 0.38 | 113.5 ± 0.79 | 0.052 |
| DBP (mmHg) | 67.4 ± 0.26 | 67.9 ± 0.55 | 0.370 |
| Mean arterial blood pressure (mmHg) | 82.2 ± 0.26 | 83.1 ± 0.55 | 0.128 |
| Cholesterol (mmol/l) | 4.4 ± 0.03 | 4.4 ± 0.06 | 0.327 |
| Duration of diabetes (years) | 6.2 ± 0.11 | 5.6 ± 0.22 | 0.026 |
| A1C (%) | 8.5 ± 0.04 | 8.5 ± 0.09 | 0.944 |
Data are age and sex-adjusted means ± SE or %. n = number at risk.