Participant characteristics based on gradable baseline exams
| Parameter | Gradable exams (n=236) | Ungradable exams (n=81) | p Value |
|---|---|---|---|
| Age, mean (SD), years | 65.4 (10.0) | 72.4 (8.7) | <0.0001 |
| Haemoglobin A1C, mean (SD), % | 7.3 (1.4) | 7.1 (1.2) | 0.32 |
| Blood pressure, mean (SD), mm Hg | |||
| Systolic | 131.7 (18.0) | 136.2 (19.1) | 0.06 |
| Diastolic | 72.0 (10.4) | 68.1 (11.5) | 0.005 |
| Years since diabetes diagnosis, mean (SD) | 11.1 (8.5) | 14.8 (11.5) | 0.005 |
| Gender (male/female) | 224/12 | 78/3 | 0.61 |
| Race, number (%) | |||
| Caucasian | 197 (83%) | 66 (81%) | 0.79 |
| African–American | 30 (13%) | 9 (11%) | 0.72 |
| Asian | 0 | 0 | |
| American Indian/Alaskan Native | 9 (4%) | 3 (4%) | 0.97 |
| Native Hawaiian | 2 (1%) | 0 | 0.41 |
| Hispanic | 3 (1%) | 2 (2%) | 0.46 |
| Other | 3 (1%) | 2 (2%) | 0.46 |
| Intraocular pressure, mean (SD), mm Hg | |||
| Technology-assisted eye exam | 16.1 (3.9) | 14.8 (3.5) | 0.005 |
| Comprehensive eye exam | 15.9 (3.2) | 14.6 (3.1) | 0.001 |
| Best eye visual acuity, mean (range) | |||
| Technology-assisted eye exam | |||
| logMAR | 0.10 (0–0.60) | 0.12 (0–0.40) | 0.46 |
| Snellen | 20/25 (20/20–20/80) | 20/25 (20/20–20/50) | |
| Comprehensive eye exam | |||
| logMAR | 0.04 (0–0.40) | 0.07 (0–0.30) | 0.05 |
| Snellen | 20/20 (20/15–20/50) | 20/20 (20/20–20/40) | |