attack rate

attack rate

n.

A cumulative incidence rate used for particular groups observed for limited periods under special circumstances, such as during an epidemic.

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attack

an episode or onset of illness.

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attack rate

the proportion of a population affected by the disease during a prescribed, usually short, period of time.

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rate

the frequency with which an event or circumstance occurs per unit of time.

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attack rate

the proportion of a population affected by a specific condition during a prescribed, usually short, period of time.

attribute-specific rate

the rate of occurrence of a specific attribute.

basal metabolic rate (BMR)

an expression of the rate at which oxygen is utilized in a fasting subject at complete rest as a percentage of a value established as normal for such a subject.

birth rate

the number of births during one year for the total population (crude birth rate), for the female population (refined birth rate), or for the female population of reproductive age (true birth rate).

case rate

morbidity rate.

case fatality rate

the number of deaths due to a specific disease as compared with the total number of cases of the disease.

cohort rate

the rate of occurrence of e.g. disease in cohorts.

death rate

the number of deaths per stated number of animals (1000 or 10,000 or 100,000) in a certain region in a certain time period.

erythrocyte sedimentation rate (ESR)

see erythrocyte sedimentation rate.

fatality rate

the number of deaths caused by a specific circumstance or disease, expressed as the absolute or relative number among individuals encountering the circumstance or having the disease.

five-year survival rate

an expression of the number of survivors with no trace of disease 5 years after each has been diagnosed or treated for the same disease.

forced expiratory flow rate (FEF)

see maximal expiratory flow rate (below).

glomerular filtration rate

an expression of the quantity of glomerular filtrate formed each minute in the nephrons of both kidneys, calculated by measuring the clearance of specific substances, e.g. inulin or creatinine.

growth rate

an expression of the increase in size of an organic object per unit of time.

heart rate

the number of contractions of the cardiac ventricles per unit of time.

incidence rate

describes the probability of a new case occurring during a stated time interval.

infection rate

percentage of the population from which a specific infectious pathogen is isolated.

rate-limiting enzymes

rate controlling enzymic steps in metabolic pathways. Often allosteric enzymes with allosteric effector sites but can be controlled through substrate availability, product removal or enzyme concentration.

maximal expiratory flow rate (MEFR)

the slope of the line connecting the points 200 ml and 1200 ml on the forced expiratory volume curve. See also pulmonary function tests. Called also FEF_200-1200.

metabolic rate

an expression of the amount of oxygen consumed by the body cells.

morbidity rate

the number of cases of a given disease occurring in a specified period per unit of population.

mortality rate

death rate; the mortality rate of a disease is the ratio of the number of deaths from a given disease to the total number of cases of that disease.

reactor rate

percentage of reactors in a tested population.

respiration rate

the number of movements of the chest wall per unit of time, indicative of inspiration and expiration.

response rate

see response.

risk rate

see relative risk.

sedimentation rate

the rate at which a sediment is deposited in a given volume of solution, especially when subjected to the action of a centrifuge. See also sedimentation rate.

specific rate

expresses the frequency of a characteristic per unit of the population.

rate standardization

adaptation of a rate so that the conditions under which it occurred are comparable with those in which other rates have been estimated. There are several methods, e.g. the equivalent average death rate.

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attack rate

Clinical epidemiology An expression of incidence, defined as the proportion of persons at risk for an infection who become infected over a period of exposure. See Incidence rate.