The power of negative thinking

TO ASSESS a diabetic's risk of heart disease, a doctor typically takes a blood sample to look for biochemical telltales such as the level of insulin. The traditional method certainly does not involve sitting the patient down on a psychiatrist's couch to see if a glass of water looks half empty or half full. The latter technique may, however, turn out to be as much to the point as blood tests, because some new research suggests that depressed diabetics are, quite literally, prone to getting their hearts broken.