Early onset depression (before 20 years of age) is particularly associated with a significantly higher risk of relapse and recurrence. For those who have been suicidal in the past, any depressed mood is likely to be accompanied by a return of suicidal thinking.
发作两三次后，重犯的可能性提高了80-90%。如果患上抑郁症时年龄很小（还不到20岁），那么复发和重犯的危险性会大大提高。对产生过自杀念头的病人来讲，任何情绪抑郁都可能导致再次产生轻生之念。