itcadd: Determines potential ITC intervals according to expected...

Description Usage Arguments Value Author(s) References Examples

Description

Either speciifies the ITC interval endpoints as fixed or else determines candidates based on expected event criteria

Usage

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itcadd(dataset, nmaxint, interval_width, min_exp_events, nitc_fixed, n_start_fixed,
 n_stop_fixed, interval_stop_beginning)

Arguments

dataset

data.frame organized as expected by tc()

nmaxint

maximum number of TC intervals allowed

interval_width

width of the TC intervals

min_exp_events

minimum number of events expected of subjects in each cell for determining ITC intervals

nitc_fixed

indicator that potential ITC intervals are fixed

n_start_fixed

number of fixed ITC starting intervals (only applicable if nitc_fixed=1)

n_stop_fixed

number of fixed ITC stopping intervals (only applicable if nitc_fixed=1)

interval_stop_beginning

smallest ITC stopping interval endpoint (only applicable if nitc_fixed=1)

Value

nitc_start

number of ITC starting intervals

itc_start_endpoint

vector containing the ITC starting interval endpoints

nitc_stop

number of ITC stopping intervals

itc_stop_endpoint

vector containing the ITC stopping interval endpoints

Author(s)

James F. Troendle

References

Troendle, JF, Leifer, E, Zhang Z, Yang, S, and Tewes H (2017) How to Control for Unmeasured Confounding in an Observational Time-To-Event Study With Exposure Incidence Information: the Treatment Choice Cox Model. Statistics in Medicine 36: 3654-3669.

Examples

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##---- Should be DIRECTLY executable !! ----
##-- ==>  Define data, use random,
##--	or do  help(data=index)  for the standard data sets.

## The function is currently defined as
function (x)
{
  }

trooper197/tccox documentation built on May 8, 2019, 6:56 p.m.