Disaggregating the Universal Coverage Cube: Putting Equity in the Picture

Abstract—In recent years, the World Health Organization's “Cube Diagram” has been widely used to illustrate the policy options in moving toward Universal Health Coverage. The Cube has become a globally recognized visual representation of health system reform choices, with its axes defined by: (1) the services covered by pooled funds, (2) the population covered, and (3) the proportion of costs covered. The Cube shows the difference between the current national coverage situation in a country and the policy goal of universal health coverage, identifying where major gaps exist. The essential feature of the Cube diagram is that it shows a country's coverage situation in terms of national averages. As a result, it does not present or call attention to significant disparities in coverage across population groups, which are characteristic of most low- and middle-income countries. This article recommends adding a new diagram that disaggregates the Cube. The new diagram, called the Step Pyramid, allows a policy ma...