Social deprivation is an independent risk factor for the development of DFD, PN, FU, PVD, LLA, and gangrene in newly diagnosed patients with type 2 diabetes. Strategies targeting patients in socially deprived areas are needed to reduce health inequalities considering the high individual and economic burdens of DFD.
OBJECTIVE To investigate the relationship between social deprivation and incident diabetes-related foot disease (DFD) in newly diagnosed patients with type 2 diabetes. RESEARCH DESIGN AND METHODS A population-based open retrospective cohort study using The Health Improvement Network (1 January 2005 to 31 December 2019) was conducted. Patients with type 2 diabetes free of DFD at baseline were stratified by Townsend deprivation index, and risk of developing DFD was calculated. DFD was defined as a composite of foot ulcer (FU), Charcot arthropathy, lower-limb amputation (LLA), peripheral neuropathy (PN), peripheral vascular disease (PVD), and gangrene. RESULTS A total of 176,359 patients were eligible (56% men; mean age 62.9 [SD 13.1] years). After excluding 26,094 patients with DFD before/within 15 months of type 2 diabetes diagnosis, DFD incidentally developed in 12.1% of the study population over 3.27 years (interquartile range 1.41-5.96). Patients in the most deprived Townsend quintile had increased risk of DFD compared with those in the least deprived (adjusted hazard ratio [aHR] 1.22; 95% CI 1.16-1.29) after adjusting for sex, age at type 2 diabetes diagnosis, ethnicity, smoking, BMI, HbA(1c), cardiovascular disease, hypertension, retinopathy, estimated glomerular filtration rate, insulin, glucose/lipid-lowering medication, and baseline foot risk. Patients in the most deprived Townsend quintile had higher risk of PN (aHR 1.18; 95% CI 1.11-1.25), FU (aHR 1.44; 95% CI 1.17-1.77), PVD (aHR 1.40; 95% CI 1.28-1.53), LLA (aHR 1.75; 95% CI 1.08-2.83), and gangrene (aHR 8.49; 95% CI 1.01-71.58) compared with those in the least. CONCLUSIONS Social deprivation is an independent risk factor for the development of DFD, PN, FU, PVD, LLA, and gangrene in newly diagnosed patients with type 2 diabetes. Considering the high individual and economic burdens of DFD, strategies targeting patients in socially deprived areas are needed to reduce health inequalities.
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