Estimating and validating disability-adjusted life years at the global level: a methodological framework for cancer

Area of Science:

• Epidemiology
• Public Health
• Health Economics

Background:

• Disability-Adjusted Life Years (DALYs) are crucial for cancer control planning but require extensive data.
• Many countries lack the necessary variables to compute DALYs accurately.
• A novel methodology is proposed to derive and validate global DALYs using available data.

Purpose of the Study:

• To develop a methodology for estimating global DALYs for cancer.
• To validate the derived variables and DALYs using cancer registry data.
• To enable international comparisons for cancer control prioritization.

Main Methods:

• DALYs were estimated for four countries across the Human Development Index (HDI) spectrum.
• Data sources included Globocan2008, cancer registries, treatment guidelines, and burden of disease studies.
• Country-specific survival, proportion cured/treated were estimated using mortality:incidence ratios and HDI.

Main Results:

• The derived estimates showed good agreement with observed cancer registry data.
• DALY estimates were comparable to established global burden of disease studies.
• Significant cross-country variations in DALYs by cancer site were observed, with higher burdens from breast, colorectal, prostate, and lung cancers in high-HDI countries.

Conclusions:

• The proposed methodology successfully generates country-specific DALY variables.
• This approach facilitates global DALY estimation and international comparisons.
• The findings support evidence-based prioritization for global cancer control efforts.