compare_concordance

This Python package implements a statistical test for the comparison of correlated right-censored concordance indices. The code is derived entirely from the GPLv3-licensed R package compareC. Accordingly, this package is also licensed under GPLv3. If you use it in published work, you should cite the original authors' paper (see below).

Installation

First, build the C library:

$ python3 setup.py build_ext

Then, install using Pip:

$ pip3 install .

This has been tested on 64-bit Linux with GCC version 7.5.0 and Python 3.6. If the installation step fails, it may be because your system names the .so file differently than expected.

Usage

from compare_concordance import compare_concordance

scores_1 = model1.predict(x)
scores_2 = model2.predict(x)

concordance_1, concordance2, difference, zscore, pvalue = compare_concordance(
    y['time'],
    y['status'],
    scores_1,
    scores_2
)

Citation

Kang L, Chen W, Petrick NA and Gallas BD (2015). "Comparing two correlated C indices with right-censored survival outcome: a one-shot nonparametric approach." Statistics in Medicine, 34(4), pp. 685-703. http://dx.doi.org/10.1002/sim.6370.

Bibtex

@Article{,
  title = {Comparing two correlated C indices with right-censored
    survival outcome: a one-shot nonparametric approach},
  author = {Le Kang and Weijie Chen and Nicholas A. Petrick and
    Brandon D. Gallas},
  year = {2015},
  volume = {34},
  number = {4},
  pages = {685-703},
  journal = {Statistics in Medicine},
  url = {http://dx.doi.org/10.1002/sim.6370},
}