[The emphasis today is on relatively low-tech screens for signs of incipient chronic disease -- adult-onset diabetes, hypertension and heart disease, cancer and the like. To help doctors track these indicators, the preventive services task force revises its guidelines continuously. Recently, for example, the task force recommended that doctors screen patients for depression. The screen is simple, almost a casual conversation --] How's work? Are you feeling stressed? Are you sleeping? ... Many people who are depressed don't go to a psychiatrist looking for insight. Most are seen in primary-care situations. Carolyn Clancy