Designed to assess the health and nutritional status

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designed to assess the health and nutritional status of adults and children in the United States. The survey is unique in that it combines interviews and physical exams NHANES is conduced in 2-year cycles (2011-2012, 2013-2014) NHANES uses a complex sampling design that incorporates several geographic levels
Representative of the entire US population BRFSS Behavioral Risk Factor Surveillance System: collects data on cigarette smoking, alcohol use, physical activity, diet, hypertension, and seatbelts to examine premature morbidity and mortality among adults Case registries: A centralized database for collection of information about a disease Data can be used to - Estimate incidence, prevalence, and survival - Track patients course of treatment/time to death - Select cases for case-control studies Examples include cancer registries Case registries: NPCR National Program of Cancer Registries (NPCR) Administered by the CDC Collects data on the occurrence of cancer, type, extent, location and type of initial treatment State registries: - Monitor trends - Determine cancer patterns - Guide planning and evaluation of programs - Help set priorities for resources Insurance data: Medicare Contains information collected by Medicare to pay for health care services provided to a Medicare beneficiary Some of the information collected includes: - Procedure and diagnosis information - Dates of service - Revenue center detail - Payment and charge amounts - Beneficiary demographic information - Limited professional provider and facility data Much of the data is not publically-available Medical records data Inpatient and outpatient data Limitations of data: - Not representative of any specific population - Different information collected on each patient - Confidentially of patient data (HIPPA) - Settings may differ according to social class of patients (specialized clinics vs emergency rooms) Advantages: - Verify self-reported medical history or behaviors - Determine patient’s exposure to medical treatments - Have a temporal record of the patient’s medical history
Definition of Surveillance Initially used to describe monitoring of persons who, because of an exposure, were at risk of developing disease. - If they exhibited evidence of disease, they could later by quarantined to prevent its spread The World Health Organization (WHO) defines surveillance as the “continuous, systematic collection, analysis and interpretation of health-related data needed for the planning, implementation, and evaluation of public health practice” Purposes of Surveillance Good surveillance provides: 1. An accurate assessment of health status in a population 2. Quantitative measures to define public health priorities 3. Strategies for health promotion & disease prevention 4. Ability to evaluate interventions and outcomes 5. Information to plan and conduct future research Uses of Surveillance Data: Immediate Immediate detection is important for: - Epidemics - Newly emerging health problems - Changes in health practices - Changes in antibiotic resistance Uses of Surveillance Data: Annual Annual dissemination: - Estimate the magnitude of a health problem and its cost -

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