selman Al Kerety In public health we use ratios and proportions to characterize populations by age sex race exposures and other variables We also use ratios proportions ID: 1041812
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1. Epidemiology RatesDr. selman Al-Kerety
2. In public health, we use ratios and proportions to characterize populations by age, sex, race, exposures, and other variables. We also use ratios, proportions, and, most important rates to describe three aspects of the human condition: morbidity (disease), mortality (death) and natality (birth).
3. Frequency of measures by type of event describedConditionRatiosProportionsRatesMorbidity(Disease)Risk ratio(Relative risk)Rate ratioOdds ratioAttributableproportionPoint prevalenceIncidence rateAttack rateSecondary attack ratePerson-time ratePeriod prevalence
4. Frequency of measures by type of event describedConditionRatiosProportionsRatesMortality(Death)Death-to-case ratioMaternal mortality rateProportionate mortalityratioPostneonatal mortalityRateProportionatemortalityCase-fatality rateCrude mortality rateCause-specific mortalityrateAge-specific mortality rateSex-specific mortality rateRace-specific mortality rateAge-adjusted mortality rateNeonatal mortality rateInfant mortality rateYears of potential life lostrate
5. Frequency of measures by type of event describedConditionRatiosProportionsRatesNatality(Birth) Low birth weight ratioCrude birth rateCrude fertility rateCrude rate of naturalincrease
6. Information ratios on mortality from bird flu
7. information proportions on mortality from bird flu
8. Morbidity Frequency MeasuresTo describe the presence of disease in a population, or the probability (risk) of its occurrence, we use one of the morbidity frequency measures. In public health terms, disease includes illness, injury, or disability.
9. Disease Incidence RateAn incidence rate : rate is the number of new cases per population at risk in a given time period., such as a new case of illness, occurs in a population over a period of time.
10. Incidence RateIncidence rate = New cases occurring during a given time period population at risk during the same time period x 10n
11. Disease Attack RateIn epidemiology, the attack rate is the biostatistical measure of frequency of morbidity, or speed of spread, in an at risk population. It is used in hypothetical predictions and during actual outbreaks of disease.
12. Secondary Attack RateSecondary Attack Rate: A measure of the frequency of new cases of a disease among the contacts of known cases.Secondary attack rate =# persons in affected household who develop disease after exposure to primary case / household contacts=
13. Disease Prevalence RatePrevalence: The number or proportion of cases or events or conditions in a given population.Prevalence Rate: The proportion of persons in a population who have a particular disease or attribute at a specified point in time or over a specified period of time. Prevalence Rate= new + old case
14. Mortality StatisticsMortality Rate: A measure of the frequency of occurrence of death in a defined population during a specified interval of time.Mortality Rate, Infant:.Mortality Rate, Neonatal: Mortality Rate, Postneonatal:
15. Mortality Rate, Infant:the number of deaths among children under one year of age reported during a given time period the number of births reported during the same time period. The infant mortality rate is usually expressed per 1,000 live births.
16. Mortality Rate, Neonatalthe number of deaths among children from birth up to but not including 28 days of age the number of live births reported during the same time period. The neonatal mortality rate is usually expressed per 1,000 live births.
17. Mortality Rate, Postneonatalthe number of deaths among children from 28 days up to but not including 1 year of age during a given time period the number of lives births reported during the same time period. The postneonatal mortality rate is usually expressed per 1,000 live births.
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