An S3 object which contains the point estimate
and test statistic after fitting a model to
have been included
The object contains the following:
The test statistic should be normally distributed and hence for the logrank test Z = (O_2 - E_2)/sqrt(V_2), i.e. the square root of the standard Chi squared statistic (with the appropriate sign)
The model used to create the fit
The method used for the fit
A point estimate of the test statistic
The estimate for the variance of the test statistic
The test statistic given by
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