Diagnosis of ScPD Clinical criteria (Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition [DSM-5]) For a diagnosis of schizoid personality disorder, patients must have a persistent pattern of Detachment from and general disinterest in social relationships Limited expression of emotions in interpersonal interactions This pattern is shown by the presence of ≥ 4 of the following: No desire for or enjoyment of close relationships, including those with family members Strong preference for solitary activities Little, if any, interest in sexual activity with another person Enjoyment of few, if any, activities Lack of close friends or confidants, except possibly 1st-degree relatives Apparent indifference to the praise or criticism of others Emotional coldness, detachment, or flattened affect Also, symptoms must have begun by early adulthood.