BACKGROUND Research shows that psychopathology, child sexual abuse and other childhood adversities are risk factors for suicide. However, few have investigated their joint and independent roles in the pursuit of a reliable, predictive model of suicidal behaviour. METHODS Data are from the National Comorbidity Survey (N = 5877), a nationally representative study of prevalence, risk factors, and social consequences of psychiatric disorders in the US. Discrete time survival analysis and population attributable risk methodologies were utilized. RESULTS Among those sexually abused as children, odds of suicide attempts were 2-4 times higher among women and 4-11 times higher among men, compared with those not abused, controlling for other adversities. Odds ratios were reduced but most remained statistically significant after adjusting for lifetime psychiatric illnesses preceding suicide attempts. In the same predictive equation, 79% of serious suicide attempts among women could be attributed to psychiatric disorders while 12% was attributable to rape and 7% to molestation. The highest probability of a first attempt was during early adolescence for those who were sexually abused and had a lifetime disorder, but it was 8-12 years older for those sexually abused without any disorders. CONCLUSIONS In the US, a strong association exists between child sexual abuse and suicidal behaviour, mediated by psychopathology. There is a substantial proportion of suicide risk attributable to child sexual abuse beyond the presence of psychopathology and other adversities. From a clinical standpoint, abuse survivors represent a high-risk population for suicidal behaviour. Further research into this preventable antecedent of suicide attempts is necessary.