2.5 Cross section studies Flashcards
What type of study are cross sectional studies?
Observational
What are cross sectional studies?
Large scale national surveys or databases capturing dif aspects of the population. Like a snap shot.
What is cross sectional also another type of study of?
Prevelance
What 3 things do cross sectional studies seek?
Associations (not causation). Generate and test hypotheses. Measure change/trends
What are the 2 cross sectional approaches?
- Collect data on each member of population. 2. Take a sample of population and draw inferences to the remainder.
What are 2 ways to collect study data/info in cross sectional studies?
- Questionnaires/survey. 2 Physical assessments.
Many of the US cross sectional studies are survey based products of what?
NCHS (national center for health statistics).
What are 4 strengths to cross sectional studies?
- quick 2. cheap. 3. can be analyzed like a case control or cohort study. 4.Useful for prevalence rates
What are weaknesses to cross sectional studies?
- Prevalent cases may represent survivors. 2. Difficult to study disease with low frequencies. 3.Unable to generate Incidence rates. 4. Problems in determining temporal relationship of presumed cause and effect.
What does NHANES mean?
National health and nutrition examination survey
What does NHIS mean?
National health interview survey
What does NAMCS mean?
National ambulatory medical care survey
What does NHCS mean?
National hospital care survey
What does BRFSS mean?
Behavioral Risk Factor Surveillance System.
What is NHANES used for?
Assesses the health and nutritional status of adults and children. Interviews and PE.
What is NHIS used for?
Health of the civilian, non-institutionalized population. Data collected through personal household interview. Door to Door.
What is NAMCS used for?
info about the provision and use of Ambulatory medical care services in the US. Bases on sample of visits to non federal, non institutional doctors primary engaged in direct pt care.
What is the NHCS used for?
Describe national patters of healthcare delivery in non federal hospital based settings. Discharges from inpatient,ER departments. Integrates 3 surveys: NHDS, NHAMCS, DAWN.
What does DAWN stand for?
drug abuse warning network
What is BRFSS used for?
Telephone health surveys that collects info on health risk behaviors, preventative health practices, and health care access primarily related to chronic disease and injury. Interviewed via phone.
