Health statistics and information systems

The National Burden of Disease (NBD) toolkit

WHO is currently developing a National Burden of Disease (NBD) toolkit, which contains a set of spreadsheet templates for carrying out Years Lost due to Disability (YLD), Years of Life Lost (YLL), Disability-Adjusted Life Year (DALY) and Comparative Risk Assessment (CRA) calculations. The NBD toolkit is currently in beta test mode and is being made available to selected research groups in Member States for experimental use.

The NBD templates contain WHO "prior" estimates of mortality and burden of disease for WHO Member States for the year 2004. These estimates are based on The global burden of disease: 2004 update as published in October 2008. Mortality estimates are based on analysis of latest available national information on levels of mortality and cause distributions. YLD estimates are based on the GBD 2004 analyses of incidence, prevalence, duration and severity of conditions for the relevant epidemiological subregion, together with national and sub-national level information available to WHO. The GBD 2004 uses the population estimates for WHO Member States for 2004 prepared by the UN Population Division in its 2006 revision.

The NBD toolkit currently comprises the following:

  • A DALY summary file containing WHO estimates of deaths, YLL, YLD and DALYs by age, sex and cause for a given Member State and its region, with the option of incorporating locally derived estimates and comparing these with WHO figures.
  • A cause-specific YLD template containing WHO estimates of mortality, incidence, prevalence, duration and severity for any given cause for a given Member State and its region, with the option of incorporating locally derived estimates and comparing these with WHO figures. Locally derived YLD calculated using this template can easily be inserted into the above DALY summary file.
  • A life expectancy and HALE template containing WHO estimates of life expectancy and health adjusted life expectancy for a given Member State and its region, with the option of incorporating locally derived estimates and comparing these with WHO figures.
  • A CRA template containing WHO estimates of attributable mortality and burden from twenty-four selected risk factors for a given Member State and its region, with the option of incorporating locally derived estimates and comparing these with WHO figures.
  • A presentation template for generating graphs and tables on key aspects of the above.

Any or all of the above can be made available to Member States on the condition that WHO prior estimates for a Member State included in the NBD toolkit are not for further publication or attribution to WHO as official estimates. They are intended to provide a starting point for more in-depth analyses by NBD study teams.

To obtain more information on the NBD toolkit, please send an e-mail to healthstat@who.int.

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