Flashcards
Week 2
Cards in this deck (20)
- 1Measures of MorbidityIncidence, Prevalence, Attack rate and secondary attack rate
- 2Measures of MortalityMortality rates
Case Fatality Rate
Mortality rate & Incidence
Problems with mortality data - 3PrevalenceNumber of people with a disease (old & new) within a given population at a given time
Point Prevalence & Period Prevalence - 4Point PrevalencePrevalence of a disease at a certain point in time (old & new cases)
Total no. of ppl who have disease at a fixed point in time divided by the total population - 5Period PrevalencePrevalence of a disease during a certain time period (old & new cases)
Total no. of people who have had disease at any time during a fixed time period divided by mid interval/average population - 6IncidenceNumber of NEW cases of a disease that occurs in a specified period of time in a population
No. of NEW cases divided by population at risk
Cumulative Incidence and Incidence Rate - 7Cumulative IncidenceNo. of new cases in defined population over a specified period / no. of disease free ppl in that population at start of time period
- 8Incidence Rateno. of new cases in defined population over a specified period / total person time at risk during specified time period
- 9Relationship between Incidence and PrevalenceP ≈ IR x D
- 10What does Prevalence measure?Determinants of disease and factors associated with survival
- 11What does Incidence measure?Probability of getting the disease (risk)
- 12Problems in measuring prevalence and incidence?1. Who has the disease? Different sources (error in data), Different criteria
2. Problems with the denominator - 13Attack RateVariant of incidence rate, applied to a narrowly defined population observed for a limited time, such as during an epidemic
No. of new cases among the population during the period / population at risk at the start of the period - 14Secondary attack ratemeasure of the frequency of new cases of a disease among contacts known as cases
no. of cases among contacts of primary cases during the period / total number of contacts - 15Annual Death rateTotal no. of deaths from all causes in 1 year / no. of persons in population at mid year
- 16Age specific mortality rateno. of deaths among persons of specific age group in 1 yr / population in specified age group at mid year
- 17Cause specific mortality rateno. of deaths from a specific cause in 1 yr / population in specific cause group at mid year
- 18Case fatality rateno. of deaths due to a certain disease / total no. suffering from that disease
- 19Crude ratesrates that apply to an entire population without taking into account any characteristics of the individuals within the population (e.g. age)
- 20Adjusted ratesrates that are calculated after taking into account any characteristics that may be different between subgroups within a population or between 2 populations (e.g. age)
Information
- Description
- Epidemiology Flashcards on Week 2, created by Indah on 11/10/2013.
- Created by
- Indah · Oct 2013
- Updated
- Feb 19, 2016
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