Sources of Data Flashcards
Uses of mortality data
1 Indicator of disease frequency
2 Etiologic information
3 Comparisons of disease occurrence in different populations and geographic areas
Issues in data sharing
PI potential loss of control over intellectual property
What is generalizability?
It is the ability to apply the findings of a study to the population that did not participate in the study.
Types of data
Primary data
Secondary data
It is the care that has been taken to identify all cases of a given disease including subclinical cases.
Thoroughness
On-line sources of epidemiologic data
PubMed
ProQuest
APA
HERDIN
What is record linkage?
It is the joining data about a single entity from two or more sources.
It includes whether there are limiting factors inherent in the data.
Strengths versus Limitations
Criteria for evaluating the quality of epidemiologic data
Nature of the data Availability of the data Completeness Strength vs Limitations Permissible study design Possible statistical analyses Appropriate inferences Quality assurance
It affects the type of statistical analysis and interferences that are possible.
Nature of data
Term for modifying identifying characteristics of data in order to protect the privacy of individual responses.
Data perturbation
Notifiable Diseases (Syndromes)
Acute flaccid paralysis Acute hemorrhagic syndrome Acute lower respiratory tract infection and pneumonia Acute watery diarrhea Acute bloody diarrhea Food poisoning Chemical poisoning
Give examples of sources of data
Vital statistics Case registries Records from medical practice Survey data Cases from health facilities
Problems in death certificate
1 Diagnostic accuracy
2 Unavailability of cause of death statements
3 Lack of standardization of diagnostic criteria
4 Easily diagnosed cases are more likely to be recorded accurately
5 Longer period between onset of disease and death can affect accuracy of death
6 Diseases to which stigma is attached may be underreported
7 Incorrect codes assigned to diseases
Examples of data sharing
Linkages of large data sets
Pooling of multiple studies in meta-analyse
