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. Author manuscript; available in PMC: 2014 Mar 1.
Published in final edited form as: Psychol Assess. 2012 Jul 16;25(1):12–22. doi: 10.1037/a0029225

Table 3.

Change in Odds of Bipolar Diagnosis (Diagnostic Likelihood Ratios) Based on Family Index of Risk for Mood (FIRM) Scores

FIRM Total Score Descriptor Sample % Likelihood Ratio for Bipolar Likelihood Ratio for Any Mood Posterior Probability of Bipolar (5% prevalence) Probability Combined with High Score on PGBI-10M (18+)
0 to 2 Low Risk 45% 0.6 0.6 .03 .33
3 to 7 Moderate Risk 42% 1.1 1.1 .05 .47
8 or more High Risk 14% 2.5 4.3 .12 .69

Note. The sample used to evaluate the diagnostic efficiency was an outpatient mental health sample with 16% prevalence of bipolar spectrum disorder and 100% of youths meeting criteria for some kind of diagnosis. PPV = Positive Predictive Value.