statsmodels.genmod.generalized_estimating_equations.GEE.compare_score_test

method

GEE.compare_score_test(submodel)

Perform a score test for the given submodel against this model.

Parameters

submodelGEEResults instance

A fitted GEE model that is a submodel of this model.

Returns

A dictionary with keys “statistic”, “p-value”, and “df”,

containing the score test statistic, its chi^2 p-value,

and the degrees of freedom used to compute the p-value.

Notes

The score test can be performed without calling ‘fit’ on the larger model. The provided submodel must be obtained from a fitted GEE.

This method performs the same score test as can be obtained by fitting the GEE with a linear constraint and calling score_test on the results.

References

Xu Guo and Wei Pan (2002). “Small sample performance of the score test in GEE”. http://www.sph.umn.edu/faculty1/wp-content/uploads/2012/11/rr2002-013.pdf