SamplingDesignTools: Tools for Dealing with Complex Sampling Designs

compute_risk_tb

R Documentation

<Private function> Compute number at risk at each event time from cohort

<Private function> Compute number at risk at each event time from cohort

compute_risk_tb(cohort, match_var_names, staggered)

`cohort`	Cohort data prepared by `prepare_cohort`.
`match_var_names`	Name(s) of the match variable(s).
`staggered`	Whether time is staggered (i.e., t_start is specified in input).

Returns a data.frame with the following columns:

t_event: Unique event times in cohort_skeleton.
n_event: Number of events at each event time.
n_at_risk: Number of subjects at risk at each event time.
strata: Strata defined by matching variables. match_var=1 if the NCC is only time-matched.
<each matching variable>: If the NCC is matched on additional confounders, each matching variable will be included as a column to the right of strata.