# print.aareg: Print an aareg object

## Description

Print out a fit of Aalen's additive regression model

## Usage

# S3 method for aareg
print(x, maxtime, test=c("aalen", "nrisk"),scale=1,...)

## Value

the calling argument is returned.

## Arguments

- x
the result of a call to the `aareg`

function

- maxtime
the upper time point to be used in the test for non-zero slope

- test
the weighting to be used in the test for non-zero slope.
The default weights are based on the variance of each coefficient, as
a function of time. The alternative weight is proportional to the number
of subjects still at risk at each time point.

- scale
scales the coefficients.
For some data sets, the coefficients of the Aalen model will be very
small (10-4); this simply multiplies the printed values by a constant,
say 1e6, to make the printout easier to read.

- ...
for future methods

## Side Effects

the results of the fit are displayed.

## Details

The estimated increments in the coefficient estimates can become quite
unstable near the end of follow-up, due to the small number of observations
still at risk in a data set.
Thus, the test for slope will sometimes be more powerful if this last
`tail' is excluded.

## References

Aalen, O.O. (1989). A linear regression model for the analysis of life times.
Statistics in Medicine, 8:907-925.