History of prior suicidality was significantly associated with highly elevated odds of 12-month suicide ideation in both developed and developing countries, with bivariate ORs in the range 28.4–48.2. (Detailed results are not presented, but are available on request.) However, the ORs were less extreme and also more varied in predicting suicide attempts among ideators (Table 5). Three results are noteworthy. First, 12-month ideators with a past history of ideation in the absence of a lifetime plan or attempt were significantly less likely to make a first attempt in the 12 months before interview than were 12-month ideators with no prior history of suicide ideation. This pattern was found both in developed and developing countries, with ORs in the range 0.1–0.2. Similarly, 12-month ideators with a prior history of a suicide plan but no prior attempt were significantly less likely to 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
