Rates of suicide attempt were considerably elevated in those reporting both anhedonia and MDD. Showing remarkable across-study consistency, 20.4% of those reporting both anhedonia and MDD in MOAFTS and CATS reported suicide attempts. In those reporting anhedonia but not meeting criteria for MDD, suicide attempts were reported by 8.4% and 8.3% of MOAFTS and CATS respectively while in those meeting criteria for MDD without anhedonia, suicide attempts were reported by 6–7% (0–1.4% in those with neither anhedonia nor MDD). Overall, 65% and 95% of suicide attempts reported in MOAFTS and CATS respectively aggregated in those with both anhedonia and MDD.
