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This is a simulated data example for the covariate history in the control group.
data("data_tte")
A data frame with 796 observations on the following 4 variables.
id
A vector for the patient id.
time
A vector for the observed time of the covariate.
Z1
A vector for the observed value of the first covariate.
Z2
A vector for the observed value of the second covariate.
data(data_tte) str(Z_t_con)
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