True prevalence of<unk>  is difficult to determine. Several studies conducted in patients diagnosed with a depressive disorder show that about 40% exhibit<unk>  symptoms, with four times more instances found in female patients. Research also supports that<unk>  tends to have an earlier onset, with teenagers and young<unk> ults more likely to exhibit<unk>  than older patients. Patients with<unk>  have shown to have higher rates of neglect and abuse in their childhood as well as alcohol and drug disorders in their family. Overall, rejection sensitivity is the most common symptom, and due to some studies forgoing this criterion, there is concern for underestimation of prevalence.
Atypical depression
Melancholic depression
Outline of bipolar disorder
Anxiety disorder
Transference neurosis
Late life depression
Retarded depression
Treatment-resistant depression