External data mapping and prediction

Reproduce predictors and generate predictions

Generate predictions from the original specification before any local updating. Missing required inputs and altered measurements are applicability problems to document, not permission to quietly refit the model.

Flow diagram

Steps

Map required predictors

Reproduce model inputs, coding and transformations exactly where possible.

Align outcome and horizon

Document ascertainment, follow-up and censoring differences.

Resolve unavailable inputs

Prespecify missingness and mapping decisions without refitting the original model.

Generate frozen-model predictions

Record artifact version, preprocessing and prediction implementation checks.

Retain reproducible evaluation inputs

Separate original predictions from any later recalibrated predictions.