diff --git a/platform-dal/src/main/java/com/lyms/platform/query/PatientsQuery.java b/platform-dal/src/main/java/com/lyms/platform/query/PatientsQuery.java
index 82b2e75..4faa7ef 100644
--- a/platform-dal/src/main/java/com/lyms/platform/query/PatientsQuery.java
+++ b/platform-dal/src/main/java/com/lyms/platform/query/PatientsQuery.java
@@ -889,7 +889,7 @@ public class PatientsQuery extends BaseQuery implements IConvertToNativeQuery {
             condition = condition.and("riskFactorId", rFactor, MongoOper.LIKE);
         }
         else if(norFactor){
-            condition = condition.and("riskFactorId", "", MongoOper.NE);
+            condition = condition.and("riskFactorId", "[]", MongoOper.NE);
             MongoCondition c = MongoCondition.newInstance();
             c1=  c.andCondition(MongoCondition.newInstance("riskFactorId", null, MongoOper.NE)).getCriteria();
         }