add crrt to kdigo concept

Author: aegis301

mimic-iv/concepts_postgres/organfailure/kdigo_stages.sql

@@ -66,6 +66,16 @@ with cr_stg AS
     SELECT
       stay_id, charttime
     FROM uo_stg
+),
+-- get CRRT data
+crrt_stg AS (
+  SELECT 
+	stay_id, 
+	charttime, 
+	CASE
+    	WHEN charttime IS NOT NULL THEN 3
+        ELSE NULL END AS aki_stage_crrt
+FROM mimic_derived.crrt
 )
 select
     ie.subject_id
@@ -80,10 +90,12 @@ select
   , uo.uo_rt_12hr
   , uo.uo_rt_24hr
   , uo.aki_stage_uo
+  , crrt.aki_stage_crrt
   -- Classify AKI using both creatinine/urine output criteria
   , GREATEST(
         COALESCE(cr.aki_stage_creat,0),
-        COALESCE(uo.aki_stage_uo,0)
+        COALESCE(uo.aki_stage_uo,0),
+        COALESCE(crrt.aki_stage_crrt,0)
         ) AS aki_stage
 FROM mimiciv_icu.icustays ie
 -- get all possible charttimes as listed in tm_stg
@@ -95,4 +107,7 @@ LEFT JOIN cr_stg cr
 LEFT JOIN uo_stg uo
   ON ie.stay_id = uo.stay_id
   AND tm.charttime = uo.charttime
+LEFT JOIN crrt_stg crrt
+  ON ie.stay_id = crrt.stay_id
+  AND tm.charttime = crrt.charttime
 ;