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

Description Usage Arguments Value Author(s) References Examples

View source: R/tccox.r

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)
{
  }

tccox documentation built on Dec. 3, 2017, 5:04 p.m.