Fig. 2.

Health problems being investigated by trials registered in the International Clinical Trials Registry Platform (ICTRP), 2012

DALY, disability-adjusted life year.

Note: Only interventional and actively recruiting trials were investigated. The health problems are split according to both the estimated numbers of trials on the ICTRP (lefthand chart) and the burden of disease that they cause globally (righthand chart). Confidence intervals were calculated for the estimates but have been omitted from the figure, for clarity.