Table 1. Baseline characteristics of the KCH cohort relative to the DRCRN laser group12.
| DRCRN laser arm | KCH cohort | P-value | |
|---|---|---|---|
| Number of patients | 115 | 100 | |
| Mean age at first laser in years | 63 | 59 | |
| Duration of diabetes at baseline in years | 15 | 13.53 | |
| Mean HbA1c | 7.5% | 8.5% | |
| Before laser at baseline | 60% | None | <0.0001 |
| Baseline VA | 62 | 67 | |
| Phakic at baseline | 79% | 91% | |
| Ethnicity at baseline | |||
| White | 74% | 38% | <0.0001 |
| Black | 9% | 47% | <0.0001 |
| Asian | 2% | 13% | 0.0055 |
| Others | 15% | 2% | 0.0015 |
| Type of diabetes | |||
| Type 1 | 4% | 0% | 0.1 |
| Type 2 | 96% | 100% | |
| Retinopathy status at baseline | |||
| Mild | 58% | 85% | <0.0001 |
| Mod | 14% | 6% | |
| Severe | 28% | 6% | |
| PDR | 16% | 3% | |
Abbreviations: DRCRN, Diabetic Retinopathy Clinical Research Network; HbA1C, glycosylated haemoglobin; PDR, proliferative diabetic retinopathy; VA, visual acuity.