estimate_rates.Rdestimate_rates is an internal helper function that estimates crude event rates.
estimate_rates(data, models)The input data frame
A model_specification object
describing the incoming data,
including the names of the variables containing the outcome (as a time-to-event),
treatment, censoring, and associated models. The outcome and censoring times
should be NA if they are censored).
A data.frame with n, person time, event count, and crude event rate.