摘要: A CONTINUING interest of the National Center for Health Statistics is development and evaluation new health indices suited to diverse specific purposes. No one index can reflect all aspects health, but there considerable agreement that an which measures some nonfatal illness as well mortality would be desirable. rationale using both disability rates components such has already been published (1). One technique combining morbidity into a single was devised reported by Chiang in conjunction with his mathematical models frequency, duration, (2). Moriyama discussed criteria desired and, view these, reviewed approaches proposed literature (3). deseription concepts being considered basis component mortality-morbidity appeared recent report (4). Another merging death rates, illustrative results are described this paper. primary objective these studies summary measure reflects changes over time status nation's population. Too little known yet about techniques, cases data they employ, permit thorough alternative construction indices. Results presented become available stimulate consideration issues possibly, further those position conduct related research. Some preliminary values based upon techniques paper have fiscal years 1958-66 (5). The estimates article also preliminary. Although relate only year, provide previously unpublished information on whites other persons sex differences. These more accurate than earlier computations values.