How is morbidity defined?

How is morbidity defined?

• A. The duration of disease
• B. The incidence of disease
• C. The prevalence of disease
• D. The mortality rate

Answer: (B)

Morbidity is about the occurrence of disease in a population, focusing on new cases that arise over a given time. In epidemiology, this is captured by incidence—the rate at which people develop the disease during a specified period, often expressed as cases per 1,000 or per 100,000 per year. Prevalence, by contrast, measures how many people have the disease at a particular time, which depends not only on how often it starts (incidence) but also on how long people remain ill. The duration of disease describes how long illness lasts, which influences prevalence but isn’t itself morbidity. Mortality rate refers to deaths due to the disease, not the occurrence of disease itself. So the best description of morbidity here is the incidence of disease.

Morbidity is about the occurrence of disease in a population, focusing on new cases that arise over a given time. In epidemiology, this is captured by incidence—the rate at which people develop the disease during a specified period, often expressed as cases per 1,000 or per 100,000 per year. Prevalence, by contrast, measures how many people have the disease at a particular time, which depends not only on how often it starts (incidence) but also on how long people remain ill. The duration of disease describes how long illness lasts, which influences prevalence but isn’t itself morbidity. Mortality rate refers to deaths due to the disease, not the occurrence of disease itself. So the best description of morbidity here is the incidence of disease.