Prevalence — In epidemiology, the prevalence of a health related state (typically disease, but also other things like smoking or seatbelt use) in a statistical population is defined as the total number of cases of the risk factor in the population at a given… … Wikipedia
Prevalence of circumcision — Map published by the United Nations (WHO/UNAIDS) showing percentage of males who have been circumcised, at a country level. Data was provided by MEASURE DHS[1] and other sources.[ … Wikipedia
Prevalence of mental disorders — The prevalence of mental disorder has been studied around the world, providing estimates on how common mental disorders are. Different criteria or thresholds of severity have sometimes been used. National and international figures are typically… … Wikipedia
Study, cross-sectional — A study done at one time, not over the course of time. A cross sectional study a disease such as AIDS might be designed to learn its prevalence and distribution within the population at one point in time. Also known as a synchronic study … Medical dictionary
New England Centenarian Study — The New England Centenarian Study is a study of persons aged 100 and over (centenarians) in the Boston area. It is one of the oldest, largest and most prestigious studies in the USA and the world.[1] The study began in 1994 and was originally… … Wikipedia
Cross-sectional study — Cross sectional studies (also known as Cross sectional analysis) form a class of research methods that involve observation of all of a population, or a representative subset, at one specific point in time. They differ from case control studies in … Wikipedia
Case study — This article is about the method of doing research. For the teaching method, see Case method. For the method of teaching law, see Casebook method. A case study is an intensive analysis of an individual unit (e.g., a person, group, or event)… … Wikipedia
Cohort study — For other senses of this word, see cohort (disambiguation). A cohort study or panel study is a form of longitudinal study (a type of observational study) used in medicine, social science, actuarial science, and ecology. It is an analysis of risk… … Wikipedia
Clefting prevalence in different cultures — Cleft lip and/or palate is a congenital abnormality that is seen frequently around the world. On average, about 1 in every 500 750 live births result in a cleft (Hardin Jones, Karnell, Peterson Falzone, 2001). Furthermore, in the U.S., the… … Wikipedia
Nested case-control study — A nested case control study is a variation of a case cohort study in which only a subset of controls from the cohort are compared to the incident cases. In a case cohort study, all incident cases in the cohort are compared to a random subset of… … Wikipedia
