Using a nationally representative sample of 16,296 high school students, we
examined those who reported attempting suicide but did not report a suicid
e plan in the past 12 months. Results from logistic regression analyses sho
wed that the 15% of attempters who did not report planning were as likely t
o receive medical treatment after their attempt as the attempters who did r
eport planning. They also were more likely than nonideators and less likely
than attempters who reported planning to report substance use and weapon c
arrying. All attempters, regardless of planning, were at high risk for figh
ting. Additional effort is needed to understand and prevent unplanned suici
de attempts.