| aee {acc} | R Documentation |
Creates an aee object
Description
Creates an aee object for semiparametric regression with augmented estimating equation.
Usage
aee(ID, time, minutes)
Arguments
ID |
Individual identifier |
time |
Observation time |
minutes |
Minutes of physical activity |
Value
psDF |
A data frame, part of original input data frame with variable "ID", "time" and "count" |
timeGrid |
Ordered distinct observation times in the set of all observation times |
panelMatrix |
a matrix representation of panel count data, one row per subject, one column per time point in "timeGrid" |
Author(s)
Jaejoon Song <jjsong2@mdanderson.org>
References
Wang, X. and Yan, J. (2011). Fitting semiparametric regressions for panel count survival data with an R package spef. Computer Methods and Programs in Biomedicine, 104, 278-285.
Wang, X., Ma, S., and Yan, J. (2013). Augmented estimating equations for semiparametric panel count regression with informative observation times and censoring time. Statistica Sinica, 23, 359-381.
Examples
## Not run:
# We illustrate the use of function aeexfit
# with the sample data from the National Health and Nutrition Examination Survey (NHANES)
# to examine the association between the cardiorespiratory function (i.e., VO2max)
# and daily minutes of moderate to vigorous physical activity (MVPA).
data(NHANES)
formula <- aee(ID, Day, mvpaMinutes) ~ VO2max
# Standard errors are obtained using sandwich estimation
fitted <- aeexfit(formula = formula, data = NHANES, se = "Sandwich")
summary(fitted)
## End(Not run)