diff --git a/mimic-iii/concepts/severityscores/lods.sql b/mimic-iii/concepts/severityscores/lods.sql
index b5c3a7cb..c5c82016 100644
--- a/mimic-iii/concepts/severityscores/lods.sql
+++ b/mimic-iii/concepts/severityscores/lods.sql
@@ -161,6 +161,8 @@ select
   end as cardiovascular
 
   -- renal
+  -- BUN cutoffs are mg/dL (Le Gall et al., JAMA 1996): 0 if <17, 1 if 17-27,
+  -- 3 if 28-55, 5 if >=56. Do not add mmol/L-style thresholds (e.g. 7.50).
   , case
       when bun_max is null
         or urineoutput is null
@@ -174,7 +176,6 @@ select
       when urineoutput >= 10000.0 then 3
       when creatinine_max >= 1.20 then 1
       when bun_max >= 17.0 then 1
-      when bun_max >= 7.50 then 1
     else 0
   end as renal
 
diff --git a/mimic-iii/concepts_duckdb/severityscores/lods.sql b/mimic-iii/concepts_duckdb/severityscores/lods.sql
index d7f62ce3..c9d4b093 100644
--- a/mimic-iii/concepts_duckdb/severityscores/lods.sql
+++ b/mimic-iii/concepts_duckdb/severityscores/lods.sql
@@ -145,8 +145,6 @@ WITH cpap AS (
       THEN 1
       WHEN bun_max >= 17.0
       THEN 1
-      WHEN bun_max >= 7.50
-      THEN 1
       ELSE 0
     END AS renal,
     CASE
diff --git a/mimic-iii/concepts_postgres/severityscores/lods.sql b/mimic-iii/concepts_postgres/severityscores/lods.sql
index 55422d67..6d3ced70 100644
--- a/mimic-iii/concepts_postgres/severityscores/lods.sql
+++ b/mimic-iii/concepts_postgres/severityscores/lods.sql
@@ -134,7 +134,7 @@ WITH cpap AS (
       WHEN sysbp_min < 90
       THEN 1
       ELSE 0
-    END AS cardiovascular, /* renal */
+    END AS cardiovascular, /* renal */ /* BUN cutoffs are mg/dL (Le Gall et al., JAMA 1996): 0 if <17, 1 if 17-27, */ /* 3 if 28-55, 5 if >=56. Do not add mmol/L-style thresholds (e.g. 7.50). */
     CASE
       WHEN bun_max IS NULL OR urineoutput IS NULL OR creatinine_max IS NULL
       THEN NULL
@@ -154,8 +154,6 @@ WITH cpap AS (
       THEN 1
       WHEN bun_max >= 17.0
       THEN 1
-      WHEN bun_max >= 7.50
-      THEN 1
       ELSE 0
     END AS renal, /* pulmonary */
     CASE
diff --git a/mimic-iv/concepts/score/lods.sql b/mimic-iv/concepts/score/lods.sql
index bc105402..89adccd1 100644
--- a/mimic-iv/concepts/score/lods.sql
+++ b/mimic-iv/concepts/score/lods.sql
@@ -155,6 +155,8 @@ WITH cpap AS (
         END AS cardiovascular
 
         -- renal
+        -- BUN cutoffs are mg/dL (Le Gall et al., JAMA 1996): 0 if <17, 1 if 17-27,
+        -- 3 if 28-55, 5 if >=56. Do not add mmol/L-style thresholds (e.g. 7.50).
         , CASE
             WHEN bun_max IS NULL
                 OR urineoutput IS NULL
@@ -168,7 +170,6 @@ WITH cpap AS (
             WHEN urineoutput >= 10000.0 THEN 3
             WHEN creatinine_max >= 1.20 THEN 1
             WHEN bun_max >= 17.0 THEN 1
-            WHEN bun_max >= 7.50 THEN 1
             ELSE 0
         END AS renal
 
diff --git a/mimic-iv/concepts_duckdb/score/lods.sql b/mimic-iv/concepts_duckdb/score/lods.sql
index c3889ca5..5c1d1c42 100644
--- a/mimic-iv/concepts_duckdb/score/lods.sql
+++ b/mimic-iv/concepts_duckdb/score/lods.sql
@@ -148,8 +148,6 @@ WITH cpap AS (
       THEN 1
       WHEN bun_max >= 17.0
       THEN 1
-      WHEN bun_max >= 7.50
-      THEN 1
       ELSE 0
     END AS renal,
     CASE
diff --git a/mimic-iv/concepts_postgres/score/lods.sql b/mimic-iv/concepts_postgres/score/lods.sql
index db27acc2..1f29df1d 100644
--- a/mimic-iv/concepts_postgres/score/lods.sql
+++ b/mimic-iv/concepts_postgres/score/lods.sql
@@ -133,7 +133,7 @@ WITH cpap AS (
       WHEN sbp_min < 90
       THEN 1
       ELSE 0
-    END AS cardiovascular, /* renal */
+    END AS cardiovascular, /* renal */ /* BUN cutoffs are mg/dL (Le Gall et al., JAMA 1996): 0 if <17, 1 if 17-27, */ /* 3 if 28-55, 5 if >=56. Do not add mmol/L-style thresholds (e.g. 7.50). */
     CASE
       WHEN bun_max IS NULL OR urineoutput IS NULL OR creatinine_max IS NULL
       THEN NULL
@@ -153,8 +153,6 @@ WITH cpap AS (
       THEN 1
       WHEN bun_max >= 17.0
       THEN 1
-      WHEN bun_max >= 7.50
-      THEN 1
       ELSE 0
     END AS renal, /* pulmonary */
     CASE