Disability-adjusted Life-expectancy


Health Economics

  • Disability-adjusted Life-expectancy is a measure of healthy life expectancy developed by the World Health Organization. Years of expected ill-health are weighted according to severity and subtracted from the expected overall life expectancy to give the equivalent years of healthy life. DALE was developed to facilitate international comparisons of health and health outcomes.
  • acronymDALE
    (written as disability-adjusted life-expectancy)


  • both dale and dell (OE) come ultimately from the Germanic base *dal- (which also produced German tal, ultimate source of English dollar). Dale goes back to the Germanic derivative *dalam, *dalaz, dell to the derivative *daljō. Cognate forms such as Old Norse dalr ‘bow’ and, outside Germanic, Greek thólos show that the underlying meaning of the word family is ‘bend, curve’. those members which mean ‘valley’ (including Gothic dals, which also signified ‘ditch’) were no doubt named from their rounded, hollowed-out shape.