The impact a disease or chronic condition has on the global population is determined by looking at the number of
deaths it causes, as well as the debilitating effects it has on those living with the condition.
*(1) Estimated deaths for 2004, according to the World Health Organization *(2) DALY, stands for disability adjusted life year, and can be thought of as one year of healthy life lost to a condition. The total DALY number is the number of future years of healthy life lost as the result of premature death or disability. The DALY scores were calculated by the World Health Organization using 2004 mortality and prevalence data.