Clinical characteristics and patterns of non-suicidal self-injury in an adult, online sample

We analyzed non-suicidal self-injury (NSSI) characteristics and history of mental illness diagnosis among 100 adults with a lifetime history of NSSI who were recruited as part of an online sample. Engaging in more forms of NSSI was associated with higher NSSI frequency, longer duration, and earlier onset. Lifetime history of diagnosed mental illness was related to a higher frequency of NSSI but not onset or duration. Despite all participants having a history of NSSI, less than half reported receiving a mental health diagnosis. NSSI is often dynamic and may change form, remit, and relapse over time. Clinicians should be aware of these patterns when working with clients with a history of NSSI.