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Table 2 Model validation by initial set of predictor variables

From: Models solely using claims-based administrative data are poor predictors of rheumatoid arthritis disease activity

Variable sets All clinical predictors All predictors Prescreening
Potential predictors 253 1275 279
Potential predictors with ≥1% prevalence (i.e., predictors put into model) 175 567 230
Predictors in final model 32 45 46
Fivefold cross-validated R-square (test) 0.237 0.243 0.246
Fivefold cross-validated Adj R-square (test) 0.221 0.221 0.223
<5 Years of RA disease Adj R-square 0.218 0.190 0.196
≥5 years of RA disease Adj R-square 0.186 0.185 0.185
  1. RA rheumatoid arthritis, Adj adjusted