Use this summary health measure when deaths, cases, disability weights, durations, and reference life expectancies come from a compatible burden-of-disease framework.

Approach

Whether the case counts are prevalent cases or new incident cases.

Cases

Prevalent or incident case count per condition class.

DW

Disability weight between zero and one for each class.

Durations

Average duration in years per class; required only for the incidence approach.

YLD

Total years lived with disability.

Results depend strongly on case definitions, disability weights, duration assumptions, and the standard life table. Do not mix discounted, age-weighted, incidence-based, and prevalence-based inputs without documenting the convention.

Report mortality and disability components separately alongside the combined summary measure. Case counts, crude rates, and uncertainty intervals help readers interpret what the aggregate health-loss value represents.

• DALY Calculator

  Compute disability-adjusted life years as YLL (deaths times standard life expectancy at death) plus YLD (incidence times disability weight times duration), undiscounted and without age weighting per the GBD 2010+ convention.

• YLL Calculator

  Compute total years of life lost as the sum of deaths in each age group times the standard life expectancy remaining at that age, undiscounted and without age weighting per the GBD 2010+ convention.

• HALE Calculator

  Compute health-adjusted life expectancy as total life expectancy minus the expected number of years lived in reduced health, per the definitional identity used by summary measures of population health.