I don't know the correct answer from research and don't have time to look it up, but it would make sense that having a family history of mood disorders would lead to a poor prognosis. Family conflict and certain communication styles in the family of people with schizophrenia predicts higher relapse rates and hospitalizations. I would imagine that mood disorders are also associated with these types of family systems. In other words, the conflict-filled environment makes mom depressed and makes sons schizophreniform disorder worse.