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jackwasey / icd

Fast ICD-10 and ICD-9 comorbidities, decoding and validation in R. NB use main instead of master for default branch.
https://jackwasey.github.io/icd/
GNU General Public License v3.0
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Including Age in Scoring #166

Open whninrome81 opened 5 years ago

whninrome81 commented 5 years ago

I am running {icd} over some billing/coding data locally and noticed the scores were lower than expected (whereas the van Walraven scores were in line with what was expected). I believe Charlson-Deyo uses binned age in its scoring algorithm correct? Is this implemented in the icd package in any way, or am I missing validation of this score in the absence of age?

I am new to comorbidity index calculations, so thanks for your insight in this. Thank you!

jackwasey commented 5 years ago

Thanks for raising the issue. There is a subtle distinction between Charlson Score and Risk Index, see Charlson ME, Pompei P, Ales KL, MacKenzie CR: A new method of classifying prognostic comorbidity in longitudinal studies: Development and validation. Journal of Chronic Diseases 1987; 40:373–83

To get the risk index, it is straightforward to get the Charlson score, then bucket the age and add 0 (<40) 1 (40-50) etc, but icd doesn't currently do this. Would love a pull request!