Estimate stage arrival probabilities (nu)

Estimates the probability that an individual has reached each stage given they are enrolled in the trial. Requires the data frame to have a kappa column indicating the stage reached. The returned list uses indexing such that nu[[k]] corresponds to stage \(k\), and nu[[K+1]] is the probability that an individual has their final outcome observed.

Usage

get_nu(df, K)

Arguments

df

A data frame containing a kappa column indicating the stage reached by each individual.

K

An integer specifying the number of treatment stages (decision points).

Value

A list with the following components:

nu

A list of length \(K+1\) where nu[[k]] is the estimated probability that an individual has reached stage \(k\) given enrollment.

ns

The total number of individuals enrolled in the trial (kappa > 0).

nd

The proportion of individuals who have reached their last treatment stage and have their outcome observed.