Research Article: Age at type 2 diabetes onset, HOMA-derived indices and risks of diabetic retinopathy: a real-world cross-sectional study
Abstract:
The roles of insulin resistance (IR) and ?-cell dysfunction in diabetic retinopathy (DR) remain controversial, and whether age at type 2 diabetes mellitus (T2DM) onset modifies these associations is unclear. This study aimed to evaluate the associations of HOMA-IR and HOMA-? with DR risk, stratified by age at diagnosis.
In this real-world cross-sectional study, we analyzed data from 6,996 patients with T2DM from Lishui People’s Hospital, China. Participants were categorized by age at onset (<65 vs. ?65 years) and HOMA indices (HOMA-? <66 vs. ?66; HOMA-IR <5 vs. ?5). Multivariable logistic regression was used to assess adjusted odds ratios (aORs) for DR.
A total of 1,360 DR cases were identified in 6996 participants. Low HOMA-? was significantly associated with higher DR odds, especially in the younger-onset group (aOR = 2.97, 95% CI: 2.24–3.99). High HOMA-IR was associated with increased DR odds in younger-onset participants (aOR = 3.14, 95% CI: 2.31–4.33). Notably, among participants with high HOMA-? or low HOMA-IR, age at T2DM onset did not significantly modify the association with DR. Subgroup analyses showed strong associations in those with renal dysfunction or not using lipid-lowering agents.
Both ?-cell dysfunction and insulin resistance were independently associated with increased odds of diabetic retinopathy in younger-onset type 2 diabetes. Age at onset significantly modified these associations, supporting age-stratified screening and tailored management strategies.
Introduction:
The roles of insulin resistance (IR) and ?-cell dysfunction in diabetic retinopathy (DR) remain controversial, and whether age at type 2 diabetes mellitus (T2DM) onset modifies these associations is unclear. This study aimed to evaluate the associations of HOMA-IR and HOMA-? with DR risk, stratified by age at diagnosis.
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