The 'Disability-Adjusted Life Year' (DALY) is composed of which two components?
- A Years of Life Lost (YLL) due to premature mortality + Years Lived with Disability (YLD) ✓
- B Healthy Life Years gained + Quality-Adjusted Life Years (QALYs)
- C Potential Years of Life Lost (PYLL) + Disability Weight Index (DWI)
- D Life expectancy at birth + Disability-free life expectancy
Correct answer: A. Years of Life Lost (YLL) due to premature mortality + Years Lived with Disability (YLD)
Explanation
DALY = YLL (Years of Life Lost due to premature death) + YLD (Years Lived with Disability, weighted by disability severity). One DALY = one lost year of healthy life. DALYs quantify the burden of disease by combining mortality and morbidity into a single metric. QALYs differ — they measure health gains from interventions and range from 0 (death) to 1 (perfect health). PYLL is an older measure that does not incorporate disability.
Reference: Park's Textbook of Preventive and Social Medicine, 27th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
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