Evaluation of choroidal thickness and its related factors in diabetic patients with clinically significant diabetic macular edema / 国际生物医学工程杂志

ABSTRACT

Objective To evaluate the correlation of sub-foveal chomidal thickness (SFCT) variation in type 2 diabetic patients with clinically significant diabetic macular edema (CSME) and the related factors using enhanced depth imaging optical coherence tomography technique (EDI-OCT).Methods A total of 40 normal volunteers (group A), 49 type 2 diabetic patients without CSME(group B) and 37 type 2 diabetic patients with CSME (group C) were recruited, including 67 male and 59 female.All study subjects received EDI-OCT examination.The SFCT in A, B and C groups were compared using one-way ANOVA analysis.The correlations between SFCT and duration of diabetes, fasting blood glucose (FBG), glycoseylated hemoglobin HbAlc, low density lipopmtein (LDL), triglyceride (TG), total cholesterol (TC), high density lipopmtein (HDL), systolic blood pressure (SBP) and diastolic blood pressure (DBP) were analyzed using logistic regression analysis.Results Average SFCT in group A was (271.49±36.18) μm.Average SFCT in group B was (260.48±35.27) μm, and compared with group A, the difference was not statistically significant (P＞ 0.05).Average SFCT in group C was (227.90±34.73) μm, and compared with group A, the difference was statistically significant (P＜0.01).There was a significant difference of SFCT between groups B and C (P＜0.01).There was no statistically correlation between average SFCT and duration of diabetes, FBG, HbA1c, TG, TC, HDL, creatinine, SBP and DBP (P＞0.05), while a statistically correlation between SFCT and LDL or urinary albumin excretion rate (UAER) was observed in the study (r=-0.609,-0.681, P＜0.01).Conclusions Compared with groups A and B, SFCT in type 2 diabetic patients with CSME was significantly thinner.UAER and LDL levels in type 2 diabetic patients with CSME were negatively correlated with SFCT, that is to say, with the increasing of UAER and LDL levels, SFCT in type 2 diabetic patients with CSME decreased.