intCens: Specify Time Variables

In iDOVE: Durability of Vaccine Efficacy Against SARS-CoV-2 Infection

Specify Time Variables

Description

This function is used in the model statement of idove() to specify the entry time, left interval time, right interval time, and vaccination time.

Usage

intCens(entry_time, left_time, right_time, vaccination_time)

Arguments

entry_time	The variable for the time when the participant enters the trial. Entry times must be integer (or be able to be cast as integer without loss of information), non-negative, and complete.
left_time	The variable for the last examination time when the test is negative. Left interval times must be integer (or be able to be cast as integer without loss of information), non-negative, and complete.
right_time	The variable for the first examination time when the test is positive. Right interval times must be integer (or be able to be cast as integer without loss of information), non-negative, and NA or Inf should be used if the participant never tested positive during the trial.
vaccination_time	The variable for the time when vaccination takes place. Vaccination times must be integer (or be able to be cast as integer without loss of information), non-negative, and NA or Inf should be used if the participant was not vaccinated during the trial.

Details

Times must obey the following relationships: (i) For all participants, entry_time <= left_time; (ii) For all participants that tested positive during the trial, entry_time <= left_time <= right_time; and (iii) For all participants that received vaccination, entry_time <= vaccination_time. If a case is found to violate one or more of these relationships, its entry_time is set to NA.

Value

This function is intended to be used only in the model statement of idove(). The result, a matrix, is used internally.

iDOVE documentation built on June 7, 2022, 5:06 p.m.