Photodiagnosis and Photodynamic Therapy
Choroidal microvascular heterogeneity across non-autoimmune type 2 diabetes mellitus subtypes defined by beta-cell function and insulin resistance: A wide-field swept-source OCTA study
By Xiaoyan Wu, Qiong Li, Yi Cui and 1 others.
Abstract
Objective
To investigate the intergroup differences in choroidal thickness (CT), choroidal vascularity index (CVI), and choroidal vascular volume (CVV) across non-autoimmune type 2 diabetes mellitus (T2DM) subtypes defined by beta-cell function and insulin resistance.
Methods
This cross-sectional study enrolled 22 healthy controls (22 eyes) and 85 T2DM patients (85 eyes). T2DM patients were categorized into 4 groups using K-means clustering: Severe Insulin-deficient Diabetes (SIDD) =22, Severe Insulin-resistant Diabetes (SIRD)=26, Mild Obesity-related Diabetes (MOD)=16, and Mild Age-related Diabetes (MARD)=21. CT, CVI, CVV were measured by widefield swept-source optical coherence tomography angiography (WSS-OCTA) across three concentric annular regions(0 - 10 mm, 10 - 15 mm, and 15 - 20 mm), subdivided into 12 sectors. Linear mixed-effects and multivariate regression models were constructed to evaluate intergroup differences.
