Table 1. Comparison of baseline characteristics between eyes with non-proliferative diabetic retinopathy with or without diabetic macular edema.
| Characteristic | Group I (DME) | Group II (No DME) | p-value |
|---|---|---|---|
| Number of eyes | 50 | 90 | |
| Age (year) | 68.2 ± 13.1 | 67.4 ± 13.0 | .827a |
| Gender (Men/Women) | 28/22 | 47/43 | .594b |
| Initial BCVA (logMAR) | 0.31 ± 0.22 | 0.12 ± 0.09 | .007a |
| Spherical equivalent refractive error (diopters) | -1.86 ± 1.70 | -1.79 ± 1.55 | .284a |
| Duration of DM at baseline (years) | 13.2 ± 6.6 | 14.4 ± 6.9 | .756a |
| HbA1c at baseline (%) | 6.9 ± 1.4 | 6.7 ± 1.1 | .601a |
| IOP (mmHg) | 15.6 ± 2.3 | 15.9 ± 2.5 | .677a |
| Central subfield thickness (μm) | 452.7 ± 183.2 | 282.5 ± 48.2 | .000a |
| Average RNFL thickness (μm) | 126.4 ± 34.7 | 100.7 ± 17.0 | .000a |
| Average choroidal thickness (μm) | 180.5 ± 17.5 | 174.8 ± 23.2 | .152a |
aIndependent T-test; group I vs. group II;
bChi-square test; group I vs. group II
DM = Diabetes Mellitus; DME = diabetic macular edema; IOP = intraocular pressure; MD = mean deviation; RNFL = retinal nerve fiber layer; VF = visual field