We examined 12-month prevalence of ideation, plans and attempts using cross-tabulations. We then estimated the associations between hypothesized correlates of suicide ideation and, among ideators, planned and unplanned suicide attempts using bivariate and multivariate logistic regression analysis.43 Logistic regression coefficients and 95% confidence intervals (CIs) were converted to odd ratios (ORs) for ease of interpretation. Continuous variables were divided into categories to minimize effects of extreme values. Categories were collapsed to stabilize associations when ORs did not differ meaningfully. Standard errors and significance tests were estimated with the Taylor series method44 using SUDAAN software45 to adjust for design effects. Multivariate significance was evaluated with Wald chi square tests based on design-corrected coefficient variance–covariance matrices. Statistical significance was evaluated with two-tailed, 0.05-level tests.
