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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