crude rate

crude rate
the total number of events (e.g. cases of lung cancer) expressed as a percentage (or rate per 1000, etc.) of the whole population. When factors such as age structure or sex of populations may seriously affect their rates (as in mortality or morbidity rates) it is more meaningful to compare age/sex specific rates using one or more age groups of a designated sex (e.g. lung cancer in males aged 55-64 years). More complex calculations, which take account of the age bias of a population as a whole, can produce standardized rates or - as has been used for deciding resource allocation in the National Health Service - standardized mortality ratios (SMR). In these the ratios of subgroups are expressed as percentages of that for a designated or standard population (e.g. England and Wales).

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the total number of events occurring in an entire population over a period of time, without reference to any of the individuals or subgroups within the population. Cf. adjusted r. and specific r.

Medical dictionary. 2011.

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  • crude rate — the total number of events (e.g. cases of lung cancer) expressed as a rate per 1000 population. When factors such as age structure or sex of populations can significantly affect the rates (as in mortality or morbidity rates) it is more meaningful …   The new mediacal dictionary

  • crude´ness — crude «krood», adjective, crud|er, crud|est, noun. –adj. 1. in a natural or raw state; unrefined: »Oil, ore, and sugar are crude before being refined and prepared for use. SYNONYM(S) …   Useful english dictionary

  • crude´ly — crude «krood», adjective, crud|er, crud|est, noun. –adj. 1. in a natural or raw state; unrefined: »Oil, ore, and sugar are crude before being refined and prepared for use. SYNONYM(S) …   Useful english dictionary

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  • rate — 1. A record of the measurement of an event or process in terms of its relation to some fixed standard; measurement is expressed as the ratio of one quantity to another ( e.g., velocity, distance per unit …   Medical dictionary

  • crude — I. adjective (cruder; crudest) Etymology: Middle English, from Latin crudus raw, crude, undigested more at raw Date: 14th century 1. existing in a natural state and unaltered by cooking or processing < crude oil > 2. archaic unripe, immature …   New Collegiate Dictionary

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