case-control

The term 'case-control' is a modern English compound adjective formed within the specialized lexicon of epidemiology and medical research. The first element, 'case', derives from the Latin casus, which originally meant 'a fall' but evolved to signify 'an event' or 'occurrence', and in medical terminology, specifically an instance of a disease. The second element, 'control', originates from the practice of keeping a duplicate register (contrarotulus) for verification, leading to its modern sense of a standard for comparison. The compound logically describes a study design that compares identified instances ('cases') of a condition against a comparable group without the condition ('controls') to investigate potential causative factors. This construction follows a straightforward noun-noun pattern common in technical English to create precise, descriptive terminology.

Structure: case + control - case: From Latin casus (a falling, an occurrence, a situation). In this compound, it functions as a noun meaning 'an instance of a disease or condition'. - control: From Anglo-French contreroller, from Medieval Latin contrarotulare (to check by a duplicate register). In this compound, it functions as a noun meaning 'a standard of comparison in a scientific experiment'.