Chunk #22 — Methods — Construction of ERS and Assessment of its Predictive Power

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Environmental risk score as a new tool to examine multi-pollutants in epidemiologic research: an example from the NHANES study using serum lipid levels.

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metrics we compared a sequence of models, with only base covariates, base covariates + micronutrients, base covariates + micronutrients + ERS. Note that the above two metrics measure overall prediction, aggregated over all subjects. A bootstrap resampling (2000 iterations) was used to compute 95% confidence intervals of AUCs for different models [39] (the ci.auc() function in the pROC package in R [40]).