dataprep_lt: Data preparation
In intccr: Semiparametric Competing Risks Regression under Interval Censoring

dataprep_lt

R Documentation

Data preparation

Description

The function dataprep_lt reshapes data from a long format to a ready-to-use format to be used directly in the function ciregic_lt.

Usage

dataprep_lt(data, ID, W, time, event, Z)

Arguments

`data`	a data frame that includes the variables named in the `ID`, `time`, `event`, and `z` arguments
`ID`	a variable indicating individuals' ID
`W`	a vector of left-truncated time points
`time`	a variable indicating observed time points
`event`	a vector of event indicator. If an observation is righ-censored, `event = 0`; otherwise, `event = 1` or `event = 2`, where `1` represents the first cause of failure, and `2` represents the second cause of failure. The current version of package only allows two causes of failure.
`Z`	a vector of variables indicating name of covariates

Details

The function dataprep_lt provides a ready-to-use data format that can be directly used in the function ciregic_lt. The returned data frame consists of id, v, u, c, and covariates as columns. The v and u indicate time window with the last observation time before the event and the first observation after the event. The c represents a type of event, for example, c = 1 for the first cause of failure, c = 2 for the second cause of failure, and c = 0 for the right-censored. For individuals having one time record with the event, the lower bound v will be replaced by zero, for example (0, v]. For individuals having one time record without the event, the upper bound u will be replaced by Inf, for example (v, Inf].