Subclinical depression, which is also referred to as subthreshold depression, is defined as the presence of depressive symptoms that are not yet severe or persistent enough to warrant a diagnosis of major depressive disorder (MDD).
Depressive symptoms include feelings of sadness, hopelessness, or guilt, lack of energy and fatigue, problems sleeping, difficulty concentrating, and suicidal thoughts.
If such symptoms are present almost every day for a minimum of 2 weeks, then this would usually warrant a diagnosis of MDD, or major depression.
