Figure 1

Kaplan-Meier curves for diabetic retinopathy-free survival during the observation period. The curves are described according to the ALDH2 genotype (a) and the combination of the ALDH2 genotype and the serum GGT level (b). Adjusted for gender, body mass index, duration of diabetes, hemoglobin A1c and systolic blood pressure. ALDH2 aldehyde dehydrogenase 2, GGT γ-glutamyltransferase.