Which data source is NOT listed among the four data sources generally available for defining the burden of cancer?

• A. Genetic sequencing data
• B. U.S. Census data
• C. Behavioral Risk Factor Surveillance System (BRFSS) data
• D. Central cancer registry data

Answer: (A)

Estimating the cancer burden relies on population‑level data that describe how many people are affected, who they are, and what outcomes occur over time. Central cancer registry data provide counts of new cases and outcomes by age, sex, and other factors, which form the backbone for incidence and survival calculations. U.S. Census data supply the population denominators and demographic context needed to convert those counts into rates and to understand disparities. Behavioral Risk Factor Surveillance System data give insights into risk factors, screening, and health behaviors that influence cancer prevention and early detection at the population level. Mortality data from vital records show how many lives are lost to cancer and help track trends over time.

Genetic sequencing data, while crucial for understanding tumor biology and guiding individual treatment decisions, isn’t a standard population‑level source for defining the overall burden. It isn’t collected uniformly across the population, tends to be limited to specific clinics or research cohorts, and doesn’t provide the comprehensive, comparable numerator–denominator information needed to compute broad burden metrics like incidence, prevalence, and mortality.