NR503 - Epidemiology Midterm TEST EXAM Questions and Answers (2024/2025)(Verified Answers)

NR503 - Epidemiology Midterm TEST EXAM Questions and Answers (2024/2025)(Verified Answers) prevalence number of existing cases / number of population incidence number of new cases / number of persons at risk of developing disease relationship between incidence and prevalence prevalence = incidenceXduration relationship between incidence rate and mortality rate mortality rate easier to obtain than incidence - use when case-fatality rate is high - use when duration of disease is short importance of surveillance - monitor changes in disease frequency - monitor changes in levels of risk factors - conducted for infectious disease passive surveillance - disease reporting is mandated or requested with responsibility for reporting often falling on health care provider or health officer - depends on individual and staff - relatively inexpensive - easy to develop initally active surveillance - project staff recruited to carry out surveillance program - more accurate b/c it is conducted by individuals who have been specifically employed to carry out responsibilities numerator number of health events denominator population at risk absolute risk - incidence of disease in population - indicates magnitudes of risk in group of people with certain exposure - does not indicate whether exposure is associated with an increased risk of disease relative risk - risk of exposed / risk of unexposed mortality rate