Classification statistics for the suicide attempt gate and follow-up questions.

a PPV = Positive Predictive Valueb NPV = Negative Predictive ValueNote: Sensitivity is the proportion of actions coded as a true suicide attempt among people that endorsed a suicide attempt on the gate and follow-up questions. Specificity is the proportion of behaviors coded as not being a suicide attempt among people that denied a suicide attempt on the gate and follow-up questions. Positive predictive value is the proportion of people that endorsed a suicide attempt on the gate and follow-up questions among those that were coded as having attempted suicide. Negative predictive value is the proportion of people that denied a suicide attempt on the gate and follow-up questions among those that were coded as not having attempted suicide. Raw values for the proportions are given in parentheses.Classification statistics for the suicide attempt gate and follow-up questions.