What is a limitation of morbidity data obtained from surveys or insurance records?

• A. They perfectly represent the health status of the entire population.
• B. They may over-represent healthier individuals.
• C. They include only chronic conditions with equal accuracy.
• D. They provide precise data on mortality rates only.

Answer: (B)

Morbidity data from surveys or insurance records are biased because they reflect only the people who participate or have access to care. This can over-represent healthier individuals, since those with insurance and who routinely use healthcare tend to be healthier than the uninsured or those facing barriers to care, and survey respondents may likewise skew toward healthier individuals. As a result, estimates of disease burden from these sources can underestimate the true morbidity in the whole population. Interpret these data with caution and, when possible, supplement with other data sources to get a fuller picture.