1. Ms. Kuriansky and Dr. Gurland are with Biometrics Research, New York State Department of Mental Hygiene, 722 West 168th St., New York, N.Y. 10032, and the Department of Psychiatry, Columbia University, New York, where Ms. Kuriansky is Research Scientist and Dr. Gurland is Assistant Professor of Psychiatry. Dr. Deming is a consultant in statistical studies in Washington, D.C.