Scientific Reports (Jul 2021)

Development and validation of resource-driven risk prediction models for incident chronic kidney disease in type 2 diabetes

  • Sarega Gurudas,
  • Manjula Nugawela,
  • A. Toby Prevost,
  • Thirunavukkarasu Sathish,
  • Rohini Mathur,
  • J. M. Rafferty,
  • Kevin Blighe,
  • Ramachandran Rajalakshmi,
  • Anjana R. Mohan,
  • Jebarani Saravanan,
  • Azeem Majeed,
  • Viswanthan Mohan,
  • David R. Owens,
  • John Robson,
  • Sobha Sivaprasad,
  • the ORNATE India Study Group

DOI
https://doi.org/10.1038/s41598-021-93096-w
Journal volume & issue
Vol. 11, no. 1
pp. 1 – 11

Abstract

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Abstract Prediction models for population-based screening need, for global usage, to be resource-driven, involving predictors that are affordably resourced. Here, we report the development and validation of three resource-driven risk models to identify people with type 2 diabetes (T2DM) at risk of stage 3 CKD defined by a decline in estimated glomerular filtration rate (eGFR) to below 60 mL/min/1.73m2. The observational study cohort used for model development consisted of data from a primary care dataset of 20,510 multi-ethnic individuals with T2DM from London, UK (2007–2018). Discrimination and calibration of the resulting prediction models developed using cox regression were assessed using the c-statistic and calibration slope, respectively. Models were internally validated using tenfold cross-validation and externally validated on 13,346 primary care individuals from Wales, UK. The simplest model was simplified into a risk score to enable implementation in community-based medicine. The derived full model included demographic, laboratory parameters, medication-use, cardiovascular disease history (CVD) and sight threatening retinopathy status (STDR). Two less resource-intense models were developed by excluding CVD and STDR in the second model and HbA1c and HDL in the third model. All three 5-year risk models had good internal discrimination and calibration (optimism adjusted C-statistics were each 0.85 and calibration slopes 0.999–1.002). In Wales, models achieved excellent discrimination(c-statistics ranged 0.82–0.83). Calibration slopes at 5-years suggested models over-predicted risks, however were successfully updated to accommodate reduced incidence of stage 3 CKD in Wales, which improved their alignment with the observed rates in Wales (E/O ratios near to 1). The risk score demonstrated similar model performance compared to direct evaluation of the cox model. These resource-driven risk prediction models may enable universal screening for Stage 3 CKD to enable targeted early optimisation of risk factors for CKD.