Normal grief is characterized by waves of intense sadness, but the bereaved person is still capable of warm feelings. Most people experiencing normal grief do not meet the criteria for MDD and generally do not seek professional treatment anyway. However, those who suffer from MDD require early diagnosis and treatment. One study found that time spent in depression is a risk factor for suicide attempts (Sokero, 2005). In an interview with National Public Radio, Sidney Zisook was quoted as saying, "I'd rather make the mistake of calling someone depressed when they might not be depressed than miss the diagnosis." of depression, not treating it and letting this person commit suicide. » Therefore, early diagnosis and treatment of MDD is essential, regardless of the type of life event that triggered MDD.