Read one profile off the nomogram, as a clinician would

Sums the points from each axis that applies to the profile, then interpolates the total on the printed linear predictor axis. No model object is consulted, which is what makes this a check rather than a restatement of the fit.

Usage

mm_nomogram_risk(nom, profile)

Arguments

nom

An rms nomogram.

profile

One row.

Value

Predicted risk, or NA_real_ if no axis applies.

Details

An axis applies only when the profile matches every categorical value the axis holds fixed. That is how the mutually exclusive axes an interaction produces are handled: exactly one of them applies, so no variable is counted twice and none is missed.