Advantage of retrospective study - ANS-Medical records are more cokmplete
advantages of concurrent studies - ANS-May be able to interview
caregivers/patients/residents if the chart is incomplete; immediate prevention/control
measures may be instituted; can identify clusters timely; IP can provide real time
education
Attack rate - ANS-an incidence proportion, rather than a true rate,that is used to
measure the frequency of new cases of a disease or condition in a specific population
during a limited period. It is usually used to describe the proportion of the population
that develops a disease or condition during an outbreak.
The formula is
x÷y×10n
where x (the numerator) is the number of new cases or events in a population during a
given time period, y (the denominator) is the number in the population at risk during that
time period, and the result is usually expressed as cases per 100 population, or as a
percentage
Baseline - ANS-value for basis of comparison
Carrier - ANS-A person who has no recognizable signs or symptoms of a disease but is
capable of spreading disease to others
Case definition - ANS-A set of standard criteria for deciding whether a person has a
particular disease or health-related condition, by specifying clinical criteria and
limitations on time, place, and person.
Causal association - ANS-A statistical association between the occurrence of a factor
and a disease, in which available evidence indicates that the statistically associated
factor increases the probability of contracting the disease.
Chronic carrier - ANS-continue to harbor a pathogen for a long time after initial infection
Clinical stage - ANS-the stage in which the signs and symptoms of a disease arise and
are most prominent
, Cluster - ANS-group of cases in a specific time and place that might be more than
expected
Concurrent data collection - ANS-Data is collected same time or as the care of the
patient is taking place or while patient is still under care of the organization
Contact tracing - ANS-the identification and diagnosis of people who may have come
into contact with an infected person as a means of controlling the spread of a
communicable disease
convalescent carrier - ANS-a person who recovers from a disease but continues to be a
carrier
device utilization ratio - ANS-number of device days / number of patient days
Disadvantage of retrospective study - ANS-important findings may be delayed (outbreak
identification) and missing information may be impossible to obtain
disadvantages of concurrent studies - ANS-time involved in locating records on care
unit and incomplete medical records
Distribution - ANS-the frequency or pattern of an event in a population
Endemic - ANS-usual presence of a disease or condition in a specific population or
geographical area
Enzootic - ANS-The usual presence of disease among animals within a geographical
area. Animals may serve as a reservoir for zoonotic disease.
Epidemic / outbreak - ANS-The occurrence of more cases of a disease than expected in
a given area or among specific group of individuals during a specified time period
Epizootic - ANS-An excess over the expected occurrence of a disease in an animal
population Disease transmits from animal to human
Fomite - ANS-Any inanimate object to which infectious material adheres and can be
transmitted.
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