Description Usage Format Details References Examples
A longitudinal data set containing measurements on 500 subjects, each with their own sequence of follow-up time points collected at irregularly spaced follow-up time points.
1 | data("data.sim.ibm")
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A data frame with 8462 observations on the following 6 variables.
id
a numeric vector: subject identification
sex
a numeric vector: 0 = male, 1 = female
bage
a numeric vector: baseline age in years
fu
a numeric vector: follow-up time in years
pwl
a numeric vector: piecewise linear term, calculated as, max(0, age-56.5)
log.egfr
a numeric vector: response variable representing natural logarithm of estimated glomerular filtration rate
For the details of the true parameter settings, see Diggle, Sousa and Asar (2015).
Diggle PJ, Sousa I, Asar O (2015) Real time monitoring of progression towards renal failure in primary care patients. Biostatistics, 16(3), 522-536.
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