The Beijing Desheng Diabetic Eye Study: rationale, design, methodology and baseline data

Area of Science:

• Ophthalmology
• Endocrinology
• Epidemiology

Background:

• Diabetic retinopathy (DR) is a leading cause of vision loss in type 2 diabetes mellitus (T2DM).
• Understanding DR prevalence and risk factors in diverse populations is crucial for targeted interventions.
• The Beijing Desheng Diabetic Eye Study (BDDES) was established to investigate DR in a Chinese urban population.

Purpose of the Study:

• To present the rationale, design, and baseline data of the BDDES.
• To determine the prevalence of diabetic retinopathy (DR) in Chinese patients with type 2 diabetes mellitus (T2DM).
• To identify risk factors associated with DR in this population.

Main Methods:

• A community-based prospective cohort study involving 1438 participants with T2DM aged 30 years or older.
• Standardized ETDRS grading of seven-field fundus photographs was used to assess DR presence and severity.
• Logistic regression analysis was employed to identify correlations between DR and various risk factors.

Main Results:

• The prevalence of any DR was 35.4%, with mild non-proliferative DR (NPDR) at 27.7% and proliferative DR at 4.5%.
• Significant risk factors for any DR included male gender, lower income/education, longer diabetes duration, younger age at onset, higher systolic blood pressure, elevated HbA1c, albuminuria, and insulin use.
• For vision-threatening DR, younger age at onset, higher systolic blood pressure, high albuminuria, and insulin use were significant predictors.

Conclusions:

• The BDDES is the first large-scale cohort study of Chinese urban T2DM patients.
• Baseline data indicates DR prevalence and major risk factors are comparable to Western populations.
• These findings support the need for consistent DR screening and management in Chinese T2DM patients.