These include measures of indicators of disease, symptom clusters, risk-related behaviors, and outcomes, death, disease, disability, etc. The measures conventionally used are incidence rates and prevalence. In many situations there is a possibility of confusion between incidence rates and prevalence and also between rates and ratios. It is important always to specify precisely and to be aware of problems such as the distinction between rates and ratios.
Subjects: Public Health and Epidemiology.