Can dysthymia ever be so severe as to involve noticeable psychomotor retardation?

See below...: Fatigue and lack of energy are not uncommon symptoms of dysthymia. Also, when dysthymia gets severe, one might be experiencing an episode of major depression on top of their chronic dysthymia (known as double depression); psychomotor retardation is quite common then.

By definition...: ...Psychomotor retardation is the slowing down of thoughts and physical actions. If dysthymia were to become so severe as to be associated with significant psychomotor retardation, i would think rather of a major depression. But it's true that one might have pmr and not exceed the dysthymia criteria--going by the book alone.