Studies show a high incidence of mental disorders in suicide victims at the time of their death with the total figure ranging from 98% to 87.3% with mood disorders and substance abuse being the two most common.
A person diagnosed with schizophrenia may commit suicide for a number of reasons, including because of depression.
Suicide among people suffering from bipolar disorder is often an impulse, which is due to the sufferer's extreme mood swings (one of the main symptoms of bipolar disorder), or also possibly an outcome of delusions occurring during an episode of mania or psychotic depression.
Major depressive disorder is associated with a higher than average rate of suicide, especially in men.