Answer:
chronic or long-lasting.
Explanation:
The major difference between Persistence Depressive Disorder (PDD) and Major Depressive Disorder (MDD), is the intensity of the symptoms of depression in relation to time. They both present similar symptoms of depression, but the symptoms of people suffering from Persistence Depressive Disorder (PDD), also known as dysthymia, are chronic or long-lasting. The symptoms are continuous, less intense and last for at least 2 years. The symptoms of depression in PDD is less severe compared to MDD.