How long must tics be present to diagnose Persistent (Chronic) Motor or Vocal Tic Disorder?

To diagnose Persistent (Chronic) Motor or Vocal Tic Disorder, the tics must be present for at least one year. This duration requirement is essential because it helps ensure that the tics are not transient or related to temporary factors, such as stress or other situational influences. The persistence of these tics over a significant period allows clinicians to establish a clear pattern of behavior and differentiate this disorder from other tic-related conditions, including Transient Tic Disorder or the more severe Tourette's Disorder, which has different criteria related to the presence of both motor and vocal tics. Therefore, maintaining symptoms for at least one year provides a foundation for accurate diagnosis and appropriate treatment planning.