make a planned attempt in the 12 months before the interview than were 12-month ideators with no prior plan. Second, 12-month ideators with a history of prior unplanned (i.e., impulsive) attempts in both developed and developing countries have significantly elevated odds of an unplanned attempt (ORs=6.2–9.3) but not a planned attempt (ORs=1.3–2.7) than those with no prior history. Third, 12-month ideators with a history of prior planned attempts have modestly elevated odds of planned attempts in developed countries (OR=1.8) and of both planned and unplanned attempts in developing countries (ORs=1.7–1.8), although none of these associations is statistically significant. Taken together, these findings indicate that the presence of prior ideation and plans in the absence of a suicide attempt are associated with decreased likelihood of acting on suicide ideation in the prior 12 months; whereas the presence of a prior suicide attempt is associated with increased odds of acting on suicide ideation in the prior 12 months—with evidence of specificity such that those with unplanned attempts have a higher odds of subsequent unplanned attempts and those with planned attempts have a higher odds of subsequent planned attempts.
