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Cramer’s V

EM Evan Muzzall
BP Brian Perlman
LR Leonard S Rubenstein
RH Rohini J Haar
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Finally, we measured the strength of associations between the columns of the dataset via Cramer’s V coefficient (phi or ϕc). This value ranges between 0 and 1 and is similar to a χ2 test of independence for effect size but is interpreted like a correlation coefficient for large tables.73 Values of 0–0.30 indicate a weak correlation, 0.30–0.70 indicate a moderate correlation and 0.70–1.00 indicate a strong correlation. Confidence intervals were computed using non-central χ2 method at 95% confidence.

Cramer’s V statistics were calculated using the DescTools R package.74

Copyright and License information:  ©2021-10-01 Author(s) (or their employer(s)) 2021. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.
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