diff --git a/biomedical_schema/genome_annotation.mcf b/biomedical_schema/genome_annotation.mcf
index 2cf70ea0a..85f52a9f3 100644
--- a/biomedical_schema/genome_annotation.mcf
+++ b/biomedical_schema/genome_annotation.mcf
@@ -1031,3 +1031,9 @@ typeOf: schema:Property
 rangeIncludes: schema:Text
 domainIncludes: dcs:Gene
 description: "Alternative or secondary symbol for a gene."
+
+Node: dcid:regressionSlope
+name: "regressionSlope"
+typeOf: schema:Property
+rangeIncludes: schema:Number
+domainIncludes: dcs:StatisticalVariable
diff --git a/core/cdc.mcf b/core/cdc.mcf
index 4d5c12cb2..6e2b58994 100644
--- a/core/cdc.mcf
+++ b/core/cdc.mcf
@@ -202,6 +202,12 @@ rangeIncludes: dcs:Number
 description: "Particulate matter (PM) - is made up of particles (tiny pieces) of solids or liquids that are in the air, like dust, dirt, soot, smoke, and drops of liquid. Fine (smaller) particles, called PM2.5, are more dangerous because they can get into the deep parts of a person's lungs - or even into their blood."
 domainIncludes: dcs:Place
 
+Node: dcid:particulateMatter
+name: "particulateMatter"
+typeOf: schema:Property
+rangeIncludes: dcs:Number
+domainIncludes: dcs:Place
+
 Node: dcid:CervicalCancerScreening
 name: "CervicalCancerScreening"
 typeOf: dcs:HealthPreventionEnum