Table 4.

Classification Statistics for the IAT in Prospectively Predicting Suicide Attempt (n=91)

D score	Suicide attempt at follow-up		Sensitivity	Specificity	Positive predictive value	Negative predictive value	Likelihood ratio
	Yes	No
>0	7	15	.50	.81	.32	.90	2.63
<0	7	62	(7/14)	(62/77)	(7/22)	(62/69)	(50/0.19)

Notes: IAT = Implicit Association Test. Scores on the IAT were dichotomized to indicate either an association between death/suicide and self (D score > 0) or an association between life and self (D score < 0). Sensitivity = proportion of actual suicide attempts correctly identified by the test. Specificity = proportion of non-suicide attempts correctly identified by the test. Positive predictive value = proportion of those with a positive test who were correctly classified as a suicide attempter. Negative predictive value = proportion of those with a negative test who were correctly classified as a nonattempter.