add crrt to kdigo concept

[aegis301]

Dear MIMIC-Community,

I noticed that the presence of CRRT is missing as a parameter for KDIGO stage calculation. KDIGO states that "presence of CRRT" automatically classifies the patient as AKI stage 3.

I allowed myself to quickly write up a query which I believe would fix the problem.

I am so grateful to be able to contribute to this amazing project and I am looking forward to your input.

Kind regards
Christian

[alistairewj]

Thanks for the PR! I think this is a good contribution - two quick comments:

1. We automatically generate the scripts in the concepts_postgres folder from the concepts folder. So you'll need to move your edits over to the concepts/ folder
2. You'll need to add in the times from the CRRT table to the tm_stg CTE, with something like UNION DISTINCT SELECT stay_id, charttime FROM mimiciv_derived.crrt

[aegis301]

Hello @alistairewj, thank you so much for your kind reply. I put in place the changes you recommend and am looking forward to your input. Thank you so much for this opportunity to contribute to this project.

[alistairewj]

one last fix then it looks good!