coxVariableName: Extract variable names from a model
In bozenne/riskRegressionLight: Light version of the package riskRegression

Extract the name of the variables belonging to the linear predictor or used to form the strata

1	coxVariableName(object, model.frame)

`object`	The fitted Cox regression model object either obtained with `coxph` (survival package) or `cph` (rms package).
`model.frame`	[data.frame] dataset containing all the relevant variables (entry, time to event, type of event, variables in the linear predictor, strata). Output from `coxModelFrame`.