Public Health Practice Flashcards

Question 1

What is the central aim of public health practice, as distinct from clinical medicine?

Accepted Answer

The central aim of public health is to protect and improve the health of populations and communities, rather than focusing mainly on individual patients. It emphasizes prevention of disease and injury, promotion of healthy conditions, and reduction of health inequities through organized, collective action by governments, organizations, and community partners working together over time.

Question 2

What are the three core functions of public health described in foundational frameworks?

Accepted Answer

The three core functions are assessment, policy development, and assurance. Assessment means monitoring health status and identifying community health problems. Policy development means using evidence to inform decisions and plans. Assurance means making sure needed services exist and are accessible, either by providing them directly or by ensuring others do.

Question 3

What are the essential services of public health that agencies commonly use to organize their work?

Accepted Answer

Essential public health services are a widely used set of activities that every community should have. They include monitoring health status, investigating health threats, informing and educating the public, mobilizing partnerships, enforcing laws and regulations, linking people to services, ensuring a skilled workforce, evaluating programs, researching new solutions, and maintaining health policies and plans.

Question 4

What is the social determinants of health concept, and why does public health emphasize it?

Accepted Answer

Social determinants of health are the conditions in which people are born, grow, live, work, and age. Examples include income, education, housing, neighborhood safety, and access to food and transportation. Public health emphasizes them because many health differences between groups stem from these conditions, so improving them can benefit whole populations.

Question 5

How does the concept of health equity differ from health equality?

Accepted Answer

Health equality means everyone receives the same resources or services, while health equity means everyone has a fair opportunity to be as healthy as possible. Equity may require giving more support to people who face greater barriers, because identical treatment does not produce identical outcomes when starting conditions differ.

Question 6

What is the difference between a population approach and an individual approach to prevention?

Accepted Answer

A population approach aims to shift health risks across an entire group, such as by reducing salt in commonly eaten packaged foods or improving air quality in a city. An individual approach focuses on helping particular people change behaviors or receive care. Public health often combines both approaches.

Question 7

What does the term determinant mean in public health, and how is it used?

Accepted Answer

A determinant is a factor that influences whether a health outcome occurs or how it varies across people. Determinants can be biological, behavioral, environmental, social, or related to health services. Public health uses the concept to identify where interventions might change outcomes, and it recognizes that many determinants interact rather than acting alone.

Question 8

Why do public health professionals work across disciplines and sectors?

Accepted Answer

Public health problems usually have causes that cross medical, environmental, economic, and social boundaries, so no single discipline can solve them alone. Working across disciplines and sectors such as education, transportation, housing, and health care allows practitioners to share data, pool resources, and design solutions that address multiple determinants together.

Question 9

What is epidemiology, in the simplest terms used in public health?

Accepted Answer

Epidemiology is the study of how often health conditions occur in populations, where they occur, and which factors are associated with them. It is used to describe health problems, to investigate their causes, and to guide prevention and control efforts. It turns individual cases into patterns that guide action.

Question 10

What is the difference between incidence and prevalence?

Accepted Answer

Incidence is the number of new cases of a condition that develop during a specified time period within a population. Prevalence is the total number of existing cases at a specific point in time or during a period. Incidence shows how quickly new cases arise, while prevalence shows how many people have the condition.

Question 11

What is a rate, and why do public health workers often prefer rates to raw counts?

Accepted Answer

A rate expresses events relative to the population size in which they occur, over a stated time period. Rates are preferred over raw counts because populations differ in size, so a larger count in a larger city may still represent a lower risk. Comparing rates allows fair comparisons across places, groups, and time.

Question 12

What is the difference between a cohort study and a case-control study?

Accepted Answer

A cohort study follows groups defined by exposure forward over time to see who develops an outcome. A case-control study starts with people who already have an outcome, called cases, and compares them with people who do not, called controls. Cohort studies can measure incidence directly, while case-control studies suit rare outcomes.

Question 13

What is sensitivity, and how does it differ from specificity in a screening test?

Accepted Answer

Sensitivity is the proportion of people who truly have a condition that a test correctly identifies as positive. Specificity is the proportion of people who truly do not have the condition that the test correctly identifies as negative. A sensitive test misses few true cases, while a specific test produces few false alarms.

Question 14

What is a confounding variable, and why must public health researchers consider it?

Accepted Answer

A confounding variable is a factor that is related to both an exposure and an outcome and can distort the apparent relationship between them. For example, age may influence both exposure to a risk and the chance of developing a condition. Failing to account for confounders can lead to wrong conclusions about cause.

Question 15

What is the purpose of a randomized controlled trial in public health research?

Accepted Answer

A randomized controlled trial tests whether an intervention causes an effect by assigning participants by chance to an intervention group or a comparison group. Chance assignment makes the groups similar at the start. Such trials give strong evidence about cause and effect, though they are not always feasible or ethical.

Question 16

Why is it important to distinguish association from causation when reading health data?

Accepted Answer

An association means two factors occur together more or less often than expected, while causation means one factor actually produces the change in the other. Many associations are produced by confounding, chance, bias, or reverse timing. Public health practitioners must weigh the strength, consistency, and plausibility of evidence before acting on a suspected cause.

Question 17

What are the three levels of prevention commonly taught in public health?

Accepted Answer

The three commonly taught levels are primary, secondary, and tertiary prevention. Primary prevention aims to stop a condition from occurring, such as through immunization or injury prevention. Secondary prevention aims to detect and address a condition early, such as through screening programs. Tertiary prevention reduces the impact of an established condition and limits complications.

Question 18

What is the difference between health promotion and disease prevention?

Accepted Answer

Disease prevention focuses on reducing the occurrence or severity of specific diseases or injuries, often by addressing risk factors. Health promotion is a broader process of enabling people to increase control over and improve their health. It includes creating supportive environments, strengthening community action, and building personal skills, not only changing individual behavior.

Question 19

What is the socio-ecological model, and how does it guide prevention planning?

Accepted Answer

The socio-ecological model describes health as shaped by nested levels of influence: individual, interpersonal, community, organizational, and policy. It guides prevention planning by encouraging action at several levels at once. For example, a physical activity effort might combine peer groups, safe park access, and workplace policies.

Question 20

What is a health behavior change model, and why is it used in health promotion?

Accepted Answer

A health behavior change model is a framework that describes the factors believed to influence whether people adopt, maintain, or stop a behavior. These models are used in health promotion to guide program design, choose messages, and identify which barriers or motivators an intervention should address.

Question 21

What is a logic model, and what are its main parts?

Accepted Answer

A logic model is a visual or written map that shows how a program's resources lead to its activities and intended short-term, intermediate, and long-term outcomes. Its main parts are inputs, activities, outputs, and outcomes, along with the assumptions and external factors that influence the program.

Question 22

What is the purpose of a community needs assessment?

Accepted Answer

A community needs assessment systematically gathers information about a population's health status, risk factors, resources, and priorities so that programs address real problems. It typically combines existing data, such as vital statistics and survey results, with input from residents and partners. Its findings guide which issues to address first and how to allocate resources.

Question 23

Why do public health messages need to be tailored to their audience?

Accepted Answer

Public health messages need to be tailored because people differ in language, literacy, culture, values, and prior experience, which affects how information is understood and trusted. Clear messages use plain language, focus on a few key actions, and are tested with the intended audience before wide release.

Question 24

What is the difference between a policy intervention and an education intervention in prevention?

Accepted Answer

A policy intervention changes rules or environments so that healthy choices become easier, such as a smoke-free law. An education intervention informs or teaches individuals to build knowledge and skills, such as a class on reading food labels. Policy approaches can reach whole populations without relying on each person alone.

Question 25

What is public health surveillance, and why is it considered a core activity?

Accepted Answer

Public health surveillance is the ongoing, systematic collection, analysis, and interpretation of health data, followed by timely sharing of that information with those who need to act on it. It is considered a core activity because it detects problems early, tracks trends, and shows whether interventions are working.

Question 26

What is the difference between passive and active surveillance?

Accepted Answer

Passive surveillance relies on existing reports that health care providers, laboratories, or others submit on their own schedule, which is low cost but may miss cases. Active surveillance involves staff who regularly contact sources or review records to find cases, which takes more resources but gives more complete information.

Question 27

What is a notifiable condition, and what does reporting it involve?

Accepted Answer

A notifiable condition is a disease or health event that laws or regulations require clinicians, laboratories, or facilities to report to public health authorities. Reporting usually involves sending specified case information, such as patient identifiers, test results, and demographic details, within a set timeframe. Notification lets health departments investigate, control spread, and monitor trends.

Question 28

What is a data quality concern in health records, and why does it matter?

Accepted Answer

Data quality concerns include incomplete fields, duplicate records, inconsistent coding, and errors in entry or transfer. Poor data quality can distort counts and rates, hide disparities, delay outbreak detection, and lead to flawed decisions about resource allocation. Public health agencies address these issues through standard definitions, validation rules, training, and regular audits.

Question 29

What is a case definition, and why must it be standardized?

Accepted Answer

A case definition is a set of criteria used to decide whether a person counts as a case of a condition. It must be standardized so that health departments and researchers classify cases the same way, allowing counts to be compared across places and time.

Question 30

Why do analysts use age-adjusted rates when comparing populations?

Accepted Answer

Analysts use age-adjusted rates because age strongly affects many health outcomes, and populations often differ in their age structure. Adjustment applies a common standard age distribution so that differences reflect other factors rather than age differences alone. A crude rate, by contrast, is unadjusted and can mislead across populations with different age profiles.

Question 31

What is syndromic surveillance, and how does it differ from traditional case reporting?

Accepted Answer

Syndromic surveillance monitors groups of symptoms or non-diagnostic health indicators, such as emergency department visits or over-the-counter product sales, to detect unusual patterns early. Traditional case reporting waits for confirmed diagnoses that are reported by clinicians or laboratories. Syndromic systems are faster but less specific, so flagged patterns need follow-up investigation.

Question 32

How does a health department use surveillance data to respond to an outbreak?

Accepted Answer

A health department typically verifies reported cases, confirms case classification, and describes cases by time, place, and person to identify patterns and possible sources. It then looks for links among cases, may issue alerts or control measures, and monitors whether case counts decline after actions are taken.

Question 33

What is the purpose of program evaluation in public health?

Accepted Answer

Program evaluation systematically judges whether a program is achieving its intended goals and how it could be improved. Evaluation may examine how a program was implemented, whether its activities reached the intended people, and what outcomes followed. Findings support accountability to funders and communities and guide decisions about continuing or changing programs.

Question 34

What is the difference between process evaluation and outcome evaluation?

Accepted Answer

Process evaluation examines how a program is delivered, including activities completed, reach, participant satisfaction, and fidelity to the planned design. Outcome evaluation examines whether the program produced its intended changes in knowledge, behavior, conditions, or health status. Process data explain how results were produced, while outcome data show what changed.

Question 35

What is a SMART objective, and why is it useful in program planning?

Accepted Answer

A SMART objective is specific, measurable, achievable, relevant, and time-bound. Each letter adds a check: a specific objective names the population and change, a measurable one defines how progress will be counted, and a time-bound one sets a deadline. Such objectives help planners track progress, communicate expectations, and evaluate whether the program succeeded.

Question 36

What is a quality improvement cycle, and what does the plan-do-study-act model involve?

Accepted Answer

A quality improvement cycle repeats small tests of change and learns from each result. The plan-do-study-act model structures this work: planners set an objective and predict the result, teams carry out a small test, staff study the data to compare results with predictions, and act by adopting, adjusting, or abandoning the change.

Question 37

What is the difference between an output and an outcome in program planning?

Accepted Answer

An output is a direct product of program activities, such as the number of training sessions delivered or materials distributed. An outcome is a change that results from the program, such as increased knowledge, improved skills, changed behavior, or better health conditions. Outputs show what was done, while outcomes show what changed.

Question 38

Why do programs need a plan for sustainability?

Accepted Answer

Sustainability planning considers how a program's benefits can continue after initial grant or startup funding ends or key staff leave. Plans may include diversifying funding, training local partners, integrating activities into existing systems, and building community ownership. Without such planning, effective programs can stop abruptly, wasting investment and disrupting services people depend on.

Question 39

What is a continuous quality improvement system, and how does it differ from a one-time audit?

Accepted Answer

A continuous quality improvement system builds routine monitoring, feedback, and adjustment into everyday operations so that performance improves over time. A one-time audit checks performance against a standard at a single point, identifying gaps but not necessarily ensuring they are closed. Continuous systems emphasize ongoing learning, while audits provide a snapshot.

Question 40

Why is stakeholder engagement important in public health program planning?

Accepted Answer

Stakeholder engagement brings affected community members, partners, and decision makers into planning so that programs reflect local priorities, knowledge, and constraints. Engaged stakeholders often offer insight into barriers that outside planners might miss, and they are more likely to support and sustain the work.

Public Health Practice Flashcards

1Foundations of Population Health

2Epidemiology Essentials

3Prevention and Health Promotion

4Surveillance and Health Data

5Program Planning and Quality

Learning Resources