the speed or frequency with which an event or circumstance occurs per unit of time, population, or other standard of comparison.
a fictitious summary rate statistically adjusted to remove the effect of a variable, such as age or sex, to permit unbiased comparison between groups having different compositions with respect to these variables. See also crude rate
and specific rate
attack rate in the analysis of acute outbreaks of disease, the proportion of persons who are exposed to the disease during the outbreak who do become ill.
basal metabolic rate 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. Abbreviated BMR.
birth rate the number of live births in a geographic area in a defined period, usually one year, relative to some specified population. For the crude birth rate, it is the average total population or the midyear population in the area during the period. Specific birth rates for subsets of the population may also be calculated, for example, an age-specific birth rate is limited to the population of females of a defined age range.
case fatality rate the number of deaths due to a specific disease as compared to the total number of cases of the disease.
one giving 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. See also adjusted rate
and specific rate
the number of deaths in a certain period of time divided by the total of a given population. The crude death rate
is the ratio of the number of deaths in a geographic area in one year divided by the average population in the area during the year. The age-specific death rate
is the ratio of the number of deaths occurring in a specified age group to the average population of that group. The cause-specific death rate
is the ratio of the number of deaths due to a specified cause to the average total population. Called also mortality rate
Historic example of death rates (per 100,000) for leading causes of death for men aged 25–44 years. From Centers for Disease Control and Prevention: Morbidity and Mortality Weekly Report 42:483, 1993.
DEF rate an expression of dental caries experienced in primary teeth, calculated by adding number of those requiring filling (D), decayed teeth requiring extraction (E), and those that have already been successfully filled (F); missing primary teeth are not included in the calculation.
DMF rate an expression of the condition of the permanent teeth based on the number of teeth decayed, missing (or indicated for removal), and filled or bearing restorations. It is calculated by adding the number of carious permanent teeth requiring filling (D), carious ones requiring extraction (Mr), ones previously extracted because of caries (Mp), and permanent teeth (F).
dose rate the amount of any therapeutic agent administered per unit of time.
the death rate
in a specific group of persons simultaneously affected by some event or circumstances, such as a natural disaster.
a measure of fertility in a defined population over a specified period of time, usually one year; particularly the general fertility rate
, but also including more specific rates such as those for females of a given parity or a particular age range or that describing the completed rate for females who have finished childbearing.
fetal death rate the ratio of the number of fetal deaths in one year to the total number of both live births and fetal deaths in that year.
five-year survival rate an expression of the number of survivors with no trace of a given disease five years after each has been diagnosed or treated for the disease.
general fertility rate the most widely used measure of fertility; the number of live births in a geographic area in a year per 1000 women of childbearing age, which is usually defined as age 15 to 44 years.
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 (usually per minute).
the risk of developing a particular disease during a given period of time; the numerator of the rate is the number of new cases during the specified time period and the denominator is the population at risk during the period. Compare prevalence r.
infant mortality rate the ratio of the number of deaths in one year of children less than one year of age to the number of live births in that year.
maternal mortality rate
a rate in which the numerator is the number of maternal deaths ascribed to puerperal causes in one year; the number of live births in that year is often used as the denominator, although to make a true rate the denominator should be the number of pregnancies (live births plus fetal deaths). Called also puerperal mortality rate
mendelian rate an expression of the numerical relations of the occurrence of distinctly contrasted mendelian characteristics in succeeding generations of hybrid offspring.
metabolic rate an expression of the amount of oxygen consumed by the body cells.
neonatal mortality rate the ratio of the number of deaths in one year of children less than 28 days of age to the number of live births in that year.
perinatal mortality rate the ratio of the number of the sum of fetal deaths after 28 or more weeks of gestation (stillbirths) and deaths of infants less than 7 days of age in one time period and population to the sum of the number of live births and fetal deaths after 28 or more weeks of gestation (stillbirths) in that same time period and population.
postneonatal mortality rate the ratio of the number of deaths in a given year of children between the 28th day of life and the first birthday relative to the difference between the number of the live births and neonatal deaths in that year; the denominator is sometimes simplified, less correctly, to the number of live births. The ratio is sometimes approximated as the difference between the infant mortality rate and the neonatal mortality rate.
the number of people in a population who have a disease at a given time; the numerator is the number of existing cases of disease at a specified time and the denominator is the total population. Time may be a point or a defined interval, and is traditionally the former if unspecified. Compare incidence r.
the rate of the pulse
, measured as number of pulsations in an artery per unit of time; normally between 60 and 80 per minute in an adult.
respiration rate the number of inhalations and exhalations per unit of time, usually measured by observation of chest movements and averaging 16 to 20 per minute in an adult.
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 erythrocyte sedimentation rate.
in cardiac pacing
, the rate, expressed in units of mV/msec, at which an R wave reaches peak amplitude; it represents the maximum rate of change of amplifier output voltage.
a rate that applies to a specific demographic subgroup, e.g., individuals of a specific age, sex, or race, giving the total number of events in relation only to that subgroup. See also adjusted rate
and crude rate
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
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 (for example, velocity, distance per unit of time), or concentration formed per unit time.
2. A measure of the frequency of an event in a defined population; the components of a rate are: the numerator (number of events); the denominator (population at risk of experiencing the event); and the specified time in which the events occur.
[L. ratum, a reckoning (see ratio)]
Farlex Partner Medical Dictionary © Farlex 2012
rate The number of events divided by the period of time over which they occur. See Average payment rate, Basal metabolic rate, Basic pacing rate, Baud rate, Case rate, Composite rate, Erythrocyte sedimentation rate, False negative rate, False positive rate, Fetal heart rate, Glomerular filtration rate, Graft survival rate, Growth rate, Heart rate, Instantaneous rate, Minute volume & respiration rate, Platelet production rate, Pulse rate, Respiratory rate, Secondary attack rate, Sedimentation rate, Slew rate, Success rate, Urinary flow rate, Upper rate Epidemiology An expression of the frequency with which an event–eg, disease or death–occurs in a defined population. See Adjusted community death rate, Age-adjusted death rate, Age/sex rate, Basic reproduction rate, Birth rate, Cause-fatality rate, Cause-specific mortality rate, Crude birth rate, Crude death rate, Crude mortality rate, Death rate, Fertility rate, Fetal mortality rate, Hospital mortality rate, Incidence rate, Infant mortality rate, Maternal mortality rate, Morbidity rate, Mortality rate, Neonatal mortality rate, Postneonatal mortality rate, Prevalence rate, Rate-specific mortality rate, Sex-specific mortality rate, Total fertility rate. Cf Ratio.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.
1. A measurement of an event or process in terms of its relation to some fixed standard; expressed as the ratio of one quantity to another (e.g., velocity, distance per unit of time).
2. A measure of the frequency of an event in a defined population; the components of a rate are: the numerator (number of events); the denominator (population at risk of experiencing the event); the specified time in which the events occur; and usually a multiplier, a power of 10, which makes it possible to express the rate as a whole number.
[L. ratum, a reckoning]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
rate (rat) [L. rata, calculated]
The speed or frequency of occurrence of an event, usually expressed with respect to time or some other known standard.
In radiology, the speed with which medical images are recorded, usually expressed in images per second.
The rate of occurrence of new cases of a disease.
basal metabolic rate Abbreviation: BMR
The metabolic rate as measured 12 hr after eating, after a restful sleep, with no exercise or activity preceding testing, with elimination of emotional excitement, and at a comfortable temperature. It is usually expressed in terms of kilocalories per square meter of body surface per hour. It increases, for example, in hyperthyroidism. Synonym: resting energy expenditure
baseline fetal heart rate Abbreviation: FHR
The average range of beats per minute recorded within a 10-min time frame. The normal range is between 120 and 160 beats per minute.
The number of live births per 1000 in the population in a given year.
case rateMorbidity rate.
case fatality rate
The percentage of individuals afflicted with an illness who die as a result of it.
The frequency with which a gene will be inherited or expressed by identical or fraternal twins.
The number of deaths in a specified population, usually expressed per 100,000 population over a given period, usually 1 year. Synonym: death-to-case ratio
; mortality rate
In assisted reproduction technology, the number of newborn deliveries achieved in every one hundred follicular aspirations, embryo transfers, or stimulated cycles.
The quantity of medicine or radiation administered per unit of time.
erythrocyte sedimentation rate Abbreviation: ESR
See: sedimentation rate
The rate of occurrence of negative test results in those who have the attribute or disease for which they are being tested.
The rate of occurrence of positive test results in those who do not have the attribute or disease for which they are being tested.
The number of births per year per 1000 women between ages 15 and 44 in a given population.
fetal mortality rate
The number of fetal deaths per 1000 live births, usually per year.
The rate at which an individual, tissue, or organ grows over time.
heart rate Abbreviation: HR
The number of heartbeats per unit of time, usually expressed or written as number per minute. A normal resting heart rate for an adult is 60–100 beats per minute.
infant mortality rate
The number of deaths per year of live-born infants less than 1 year of age divided by the number of live births in the same year. This value is usually expressed as deaths per 100,000 live births. See: neonatal mortality rate; perinatal mortality rate
The speed of administration of a solution in mL/hr.
CAUTION!It is calculated by the following formula: Rate = (Dose × 60 × Body weight)/Concentration, in which the dose is in mcg/kg/min; 60 is in min/hr; weight is in kg; and the concentration of the substance in solution is in mcg/mL.
CAUSES OF MATERNAL DEATH
maternal mortality rate
The number of maternal deaths in 1 year from puerperal causes (such as those associated with pregnancy, childbirth, and the puerperium) within 42 days after delivery divided by the number of live births in that same year. This value is usually expressed as deaths per 100,000 live births. See: illustration
maximum midexpiratory flow rate Abbreviation: MMFR
The average airflow during the middle half of a forced vital capacity effort.
The rate of utilization of energy. This is usually measured at a time when the subject is completely at rest and in a fasting state. Energy used is calculated from the amount of oxygen used during the test. See: basal metabolic rate; basal metabolism
The number of cases per year of certain diseases in relation to the size of the population in which they occur. Synonym: case rate
mortality rateDeath rate.
neonatal mortality rate
The number of deaths in 1 year of infants aged 0 to 28 days divided by the number of live births in that same year. See: maternal mortality rate; perinatal mortality rate
peak expiratory flow rate
The maximum rate of exhalation during a forced expiration, measured in liters per second or liters per minute. It is used as a test of airway obstruction.
perinatal mortality rate
The number of stillbirths (in which the gestation period was 28 weeks or more) in the first 7 days of life divided by the number of live births plus stillbirths in the same year. This value is usually expressed as deaths per 100,000 live births plus stillbirths. See: infant mortality rate; neonatal mortality rate
periodontal disease rate See: periodontal (Ramfjord) index
The number of heartbeats per unit of time that can be detected by palpating any accessible artery.
The number of breaths per unit of time.
sedimentation rate Abbreviation: ESR (erythrocyte sedimentation rate)
A nonspecific laboratory test used as a marker of inflammation. In this test the speed at which erythrocytes settle out of unclotted blood is measured. Blood to which an anticoagulant has been added is placed in a long, narrow tube, and the distance the red cells fall in 1 hr is the ESR. Normally it is less than 10 mm/hr in men and slightly higher in women.
The speed at which the cells settle depends on how many red blood cells clump together. Clumping is increased by the presence of acute-phase proteins released during inflammation.
specific absorption rate
The rate at which electromagnetic energy is absorbed by a kilogram of tissue, usually expressed as the heat absorbed by the tissue, or as the power absorbed per unit of mass.
ventilation rate Abbreviation: VR
The number of breaths per minute.
Medical Dictionary, © 2009 Farlex and Partners
1. Record of measurement of an event or process in terms of its relation to some fixed standard; expressed as ratio of one quantity to another or concentration formed per unit time.
2. Measure of frequency of an event in a defined population.
[L. ratum, a reckoning]
Medical Dictionary for the Dental Professions © Farlex 2012
Patient discussion about rate
Q. What is the rate of alcoholism in the USA compared to the rest of the world? What is the rate of alcoholism in the USA compared to other countries in the world. I don't mean amount of alcohol consumed, but alcohol addiction/dependency. Links to your sources would be appreciated. Cheers! (pun intended)
A. here is a link to a CDC table about drinking hobbits of Americans:
here is an article about it, and it gives good links also:
Q. where would i find list of all the "clean" cities and the rates of air pollution ...?
A. i don't know about a list of "good" cities, but i know a list of the worse cities for Asthmatic people!-
Q. I was wondering the rate at which alcohol induces brain damage. I am not an alcoholic and I use to drink only on weekends. I was wondering the rate at which alcohol induces brain damage; I know that over some years, damage occurs, but does anything happen after a month of drinking on weekends?
A. HI WAYLON;just want to add my two cents here,EVERYTIME YOU TAKE A DRINK IT KILLS BRAIN CELL,I CANT TILL YOU HOW MANY---mrfoot56More discussions about rate
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