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HTH 450 > EXAM 1 > Flashcards

EXAM 1 Flashcards

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1
Q

What is epidemiology

A

Study of the distribution and determinants of ideas w frequency in human populations and the application of this study to control health problems.

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2
Q

Descriptive epidemiology

A

Person, place, and time

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3
Q

Burden (saturation)

A

How many individuals are impacted

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4
Q

What is rate?

A

Number of events divided by size of the population

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5
Q

Why is rate necessary?

A

It allows valid comparisons across different populations

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6
Q

Analytical epidemiology

A

Agent, host, and environment

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7
Q

Disease frequency

A

Quantifying how often a disease arises in a population (case definition, method to count cases, determining size of population

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8
Q

Population

A

Group of people with a common characteristic such as place of residence, gender, age, or use or certain medical services/resources

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9
Q

Disease control

A

Done to prevent the spread of a disease and/or decrease in the incidence

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10
Q

How is disease control accomplished?

A

Through epidemiological research and surveillance

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11
Q

What is an epidemiologist?

A

Publix health scientist who is responsible for carrying out all useful and effective activities needed for successful epidemiology practice

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12
Q

Purposes of epidemiology

A
  1. Identify etiology (cause) of disease and the risk factors associated
  2. Determine the extent of the disease found in the community
  3. Study natural history
  4. Evaluate both existing and new preventive and therapeutic measures and modes of health care delivery
  5. Provide foundation for developing (public) policy and making regulatory decisions
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13
Q

Public health

A

A multidisciplinary field whose goal is to promote the health of the population through organized community efforts

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14
Q

Types of prevention

A

Primary, secondary, tertiary

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15
Q

Primary prevention

A

Action to prevent the development of a disease in a person who is well and does NOT have disease
Ex: hand washing, education, vaccines

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16
Q

Secondary prevention

A

People who have developed the disease — screening and early intervention
Ex: mammogram, colonoscopy, pap smear

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17
Q

Tertiary prevention

A

Goal is to slow or block the progression of a disease, thereby reducing impairments and disabilities
Ex: radiation and chemo, surgery, rehab, antibiotics

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18
Q

List the 5 individuals most important in epidemiology

A

Hippocrates
James Lind
Edward Jenner
William Farr
John Snow

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19
Q

Hippocrates

A

Father of medicine
First recorded epidemiologist
Made observations about the cause and spread of disease in populations

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20
Q

James Lind

A

Delt with scurvy
Made sure cases were as similar as possible

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21
Q

Edward Jenner

A

Smallpox
came up with the idea of vaccination/immunization

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22
Q

William Farr

A

founders of modern epidemiology
Compiled the data for the first census Bureau
Used data to form hypotheses about causes and preventions of diseases
quantified and arranged mortality data

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23
Q

John Snow

A

Father of epidemiology
Believed that cholera was transmitted through contaminated water

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24
Q

epidemiological triad of disease

A

host, agent, environment

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25
host
genetics, behavior/lifestyle, habits
26
agent
microorganism must be present for infection to occur (bacteria, viruses, etc) ability to live outside host, acclimate harsh conditions, and modify antigenicity
27
environment
residential exposures occupational exposures
28
susceptibility
host must be susceptible for an interaction to take place--determined by a variety of factors
29
factors that cause human disease
biological physical chemical others
30
transmission
different organisms (agents) spread in different ways
31
factors/characteristics for determining outbreak
rate of growth of the agent transmission route
32
different types of transmission routes
oral, inhalation, dermal, injection, transplacental
33
modes of transmission
direct vs indirect
34
direct transmission
person to person (STIs)
35
indirect transmission
vehicle or vector (malaria)
36
carrier status
individual harbors the organism but is not infected as measured by serologic studies (no evidence of antibody response) --can still effect others --acute or chronic --no signs of clinical illness Ex: typhoid Mary
37
endemic
habitual presence of a disease within a given geographical area--usual occurrence of a disease within such an area
38
epidemic
occurrence in a community or region of a group of illnesses of similar nature--clearly in excess of normal expectancy derived from common or from a propagated source
39
pandemic
worldwide epidemic
40
herd immunity
resistance of a group to an attack by a disease to which a large proportion of the members of the group are immune--critical percentage of the population is immune
41
incubation period
a period of subclinical or in apparent pathologic changes following exposure, ending with the onset of symptoms of infectious disease -- interval from receipt of infection to the time of onset of clinical illness
42
why don't diseases develop immediately?
may reflect the time needed for the organism to replicate dose of infectious agent may influence the length of the incubation period
43
isolation
individuals who are ILL or symptomatic
44
quarantine
individuals who come in close contact with a case, but do not show symptoms or signs of illness and not tested positive
45
what are the three major characteristics in epidemiology?
person, place, and time
46
person
inherent characteristics (age, race, sex) acquired characteristics (marital status) activities occupation, leisure activities) condition which one lives under (socioeconomic status)
47
place
place of residence birthplace place of employment country, state, city school district
48
time
disease rates change overtime --seasonal changes --secular trends (long-term trends that help to predict future incidence of a disease)
49
measures of frequency
ratios, proportions, rates
50
ratio
relative magnitude of two quantities or a comparison of any two values -- one number divided by another
51
number of items/events/persons in one group -------------------------------- number of items/events/persons in another group
ratio formula
52
proportion
one number divided by another, but the entities represented by these numbers are related to one another--often expressed as a percentage
53
number of items/events/persons with a particular characteristic --------------------------- X 10^2 total number of items/events/persons of which the numerator is a subset
proportion formula
54
the numerator of a proportion is always a subset of the denominator (true or false)
true
55
rate
measure of risk--measure of the frequency that an event occurs
56
number of individuals who are ill at a specific time and in a specific location --------------------------- X 10^n total in the population at that specific time and in that specific location
rate formula
57
morbidity
any departure, subjective or objective from a state of physiological or psychological well-being--diseases, injuries and disabilities
58
measures of morbidity
incidence, prevalence, attack rates (type of incidence)
59
incidence
number of NEW cases of a disease that occurs in a location (place) during a specified period of time in a population at risk for developing the disease
60
incidence is a measure of risk (true or false)
true
61
cumulative incidence
period of time when all the individuals in a population are at risk regardless of exposure or other characteristics
62
number of new cases of an outcome occurring in the population during a specific period of time in a specific location --------------------------- X 10^n number of persons at risk of the outcome during that specific time period in a specific location
incidence formula
63
prevalence
number of affected persons present in the population at a specific time divided by the number of persons in the population at that time
64
prevalence does NOT take into account the duration of disease (true or false)
true
65
point prevalence
how many people have the disease at a point in time
66
period prevalence
how many people have had the disease at any time during a certain period
67
number of cases of an outcome disease present in the population at a specified time and location ------------------------- X 10^n number of persons in the population at that specified time and location
prevalence formula
68
attack rates
defines who is at risk--useful for comparing the risk of an outcome in groups with different exposures
69
types of attack rates
crude attack rates, attack rates, food-specific attack rates
70
number of persons ill with the outcome ------------------------ X 10^2 number of persons attending the event
crude attack rate formula
71
number of people at risk in whom a certain outcome develops -------------------------- X 10^2 total number of people at risk
attack rate formula
72
number of people who ate a certain food and became ill --------------------------- X 10^2 total number of people who ate that food
food-specific attack rate
73
mortality
measure of disease severity
74
why study mortality
-determine whether the treatment for a disease has become more effective overtime -serves as a substitute for prevalence rate when disease is deadly
75
crude mortality rate (crude death rate, annual death rate, mortality rate)
sometimes use the population at the midyear point because people move in and out of a specific area
76
number of deaths in a specific location at a specific time period --------------------------- X 10^n total population at that same location and during the same time period
crude mortality rate formula
77
cause-specific mortality rate
mortality rate from a specified cause for a population
78
number of individuals who die of a specific cause/outcome in a specific location during a specific time period -------------------------- X 10^n total population at that same location and during the same time period
cause specific mortality formula
79
case-fatality rate
proportion of individuals with a particular condition who die from that condition--must have the illness and must die of the illness
80
number of cause-specific deaths among the incident cases --------------------------- X 10^2 number of incident cases
case fatality rate formula
81
proportionate mortality
describes the proportion of deaths in a specified population over a period of time attributable to different causes--expressed as a percentage
82
deaths due to a particular cause -------------------------- X 10^2 deaths from all causes
proportionate mortality formula
83
survival rate
measure of prognosis--measures probability of surviving a specified period of time--expressed as a percent
84
number of newly diagnosed patients with a given disease - number of deaths observed among patients in a specified time period --------------------------- X 10^n number of newly diagnosed patients with the disease in the same time period
survival rate formula
85
problems with mortality data
-most information comes from death certificates -hard to compare two entities -age
86
when a disease is mild and NOT fatal, mortality is NOT a good measure (true or false)
true
87
why look at mortality rates
-good reflection of incidence -if CFR is high -duration of disease is short

HTH 450 (1 decks)

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