Self-injurious behaviors were uncommon among males. At age 22, three percent of males, but 13% of females reported intentional self–injury, such as cutting or burning themselves on purpose. Thirteen per cent of males and 20% of females reported suicidal ideation. Proportions and numbers of these SRBs (intentional self-injury, suicide ideation) in each tobacco use categories are shown in the Supplemental Table (Supplement 2).
