Figure 2From: The longitudinal course of non-suicidal self-injury and deliberate self-harm: a systematic review of the literature Studies on prevalence of NSSI in adolescent community samples. Only studies giving information about mean age of participants, and which used the same prevalence measures for each time-point, were included. For individual prevalence time-frames (i.e. 3-months, 6 months, etc.) of each study see Table 1.Back to article page