Print an aareg Object

DESCRIPTION:

Print out a fit of Aalen's additive regression model

USAGE:

print.aareg(x, maxtime, weight=c("var", "nrisk"))

REQUIRED ARGUMENTS:

x
the result of a call to the aareg function.

OPTIONAL ARGUMENTS:

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

VALUE:

the calling argument is returned.

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.

SEE ALSO:

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