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Related Concept Videos

Primary Healthcare Services01:30

Primary Healthcare Services

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Primary care promotes wellness and prevents disease. This care includes health promotion, education, protection (such as immunizations), early disease screening, and environmental considerations. Settings providing this type of healthcare include physician offices, public health clinics, school nursing, and community health nursing.
In 1978, international leaders convened in Alma-Ata, Kazakhstan, for what would be a pivotal event in global health. The Alma-Ata Declaration was the first to call...
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Health promotion allows a person to control the determinants of health, resulting in an improved health status. It enhances the quality of life and reduces premature deaths. Health promotion and illness prevention programs help people make beneficial choices to reduce the risk of disease and disabilities. There are three health promotion and illness prevention levels: primary, secondary, and tertiary prevention.
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Preventive Healthcare Services01:30

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Preventive healthcare services keep people healthy via frequent check-ups, screening, and counseling. They primarily aid in disease prevention rather than treating an acute or chronic illness. Preventive treatment also keeps individuals productive and energetic, allowing them to work well into their retirement years. Examples of preventive care services include:
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Principles of Disease Surveillance01:26

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Disease surveillance is the systematic collection, analysis, and interpretation of health data essential to the planning, implementation, and evaluation of public health practice. This process integrates data dissemination to entities responsible for preventing and controlling disease, injury, and disability. Surveillance systems provide crucial information for action, helping public health authorities make informed decisions to manage and prevent outbreaks, ensure public safety, optimize...
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Healthcare Agencies II01:17

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There are various healthcare agencies in the United States—some of which are managed by religious institutions and others by different government branches.
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At the different levels of the healthcare system, we see varying methods of healthcare used. These methods include managed care systems, case management, and primary healthcare.
Managed Care System:
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Related Experiment Video

Updated: Jan 8, 2026

Determining Soil-transmitted Helminth Infection Status and Physical Fitness of School-aged Children
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Public Health.

Ataru Igarashi1, Noriyuki Kimura2, Temmei Ito3

  • 1The University of Tokyo, Graduate School of Pharmaceutical Sciences, Tokyo, Japan.

Alzheimer'S & Dementia : the Journal of the Alzheimer'S Association
|December 23, 2025
PubMed
Summary

Implementing blood-based biomarkers (BBM) for Alzheimer's disease (AD) diagnosis can significantly reduce patient wait times for disease-modifying therapies (DMTs). This approach also increases the number of eligible patients, improving access to timely treatment.

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Area of Science:

  • Neurology
  • Biomarker Research
  • Health Economics

Background:

  • Alzheimer's disease (AD) diagnosis for new therapies requires amyloid-beta (Aβ) confirmation via PET or CSF.
  • Blood-based biomarkers (BBM) offer a desirable alternative for AD diagnosis, but their healthcare system impact is understudied.
  • This study evaluates the impact of incorporating BBM into diagnostic pathways for AD.

Purpose of the Study:

  • To estimate diagnostic wait times and the number of patients eligible for AD disease-modifying therapies (DMTs).
  • To analyze the economic value of incorporating BBM into various AD diagnostic flows.
  • To compare four diagnostic scenarios, including current methods and BBM implementation as triage or confirmatory tests.

Main Methods:

  • A dynamic simulation model was employed for estimations.
  • Demand for testing was assessed via an online survey of 3,302 participants based on willingness to pay (WTP) for diagnostic tests.
  • Four diagnostic scenarios were simulated: current flow, BBM as triage, BBM as confirmatory, and BBM as both triage and confirmatory.

Main Results:

  • Willingness to pay (WTP) for AD diagnostic testing varied by cognitive impairment severity, with mild dementia showing the highest mean WTP.
  • Average patient wait times for diagnosis ranged from 4.7 to 7.8 months across scenarios, with the longest waits in Scenario C (BBM as confirmatory).
  • Scenarios C and D (involving BBM as confirmatory) projected a higher cumulative number of DMT-eligible patients by 2025 compared to Scenarios A and B.

Conclusions:

  • Implementing BBM as a triage test shows potential for reducing diagnostic wait times, especially in primary care settings.
  • Utilizing BBM as a confirmatory test can increase the number of patients eligible for DMTs.
  • The integration of BBM into diagnostic pathways can improve specialist capacity and reduce costs, thereby enhancing access to timely AD treatment.