Causes of Disease and Maintaining Health — Pearson Occupational Qualification Public Services Revision
This subtopic explores the fundamental concepts of health and disease, examining the multifaceted factors influencing individual well-being and the common
Topic Synopsis
This subtopic explores the fundamental concepts of health and disease, examining the multifaceted factors influencing individual well-being and the common causes of illness. It emphasises the practical application of prevention strategies and the crucial role of healthcare professionals in supporting patients to manage their health, alongside the functions of UK public health bodies in safeguarding population health.
Key Concepts & Core Principles
- Human anatomy and physiology: understanding the structure and function of major body systems, including cardiovascular, respiratory, and nervous systems, and how they relate to common diagnostic tests.
- Clinical biochemistry: principles of analyzing bodily fluids (blood, urine) to detect diseases, including glucose testing, liver function tests, and electrolyte balance.
- Medical physics: application of physics in healthcare, such as X-ray imaging, ultrasound, and radiation safety, including the principles of wave behavior and energy transfer.
- Laboratory techniques: safe handling of specimens, use of microscopes, centrifugation, and spectrophotometry, along with quality control and data recording.
- Health and safety: COSHH regulations, risk assessments, infection control, and proper disposal of hazardous materials in a laboratory setting.
Exam Tips & Revision Strategies
- Use precise terminology when defining health and disease; quote the WHO definition if applicable, and always provide concrete examples to support your explanations.
- In questions about health factors, structure your answer using a recognised framework (e.g., Dahlgren and Whitehead’s rainbow model) to show depth and organisation.
- For causes of disease, create mind maps linking each cause to a specific disease mechanism and a named example, ensuring you cover non-communicable as well as communicable diseases.
- When discussing prevention strategies, always relate them to the patient pathway: mention how they reduce incidence, severity, or complications, and reference national campaigns.
- On patient self-management, highlight the shift from paternalistic to collaborative care models, and use phrases like ‘empowerment’, ‘health literacy’, and ‘self-efficacy’.
- For public health bodies, memorise one key function and one real-world campaign per organisation to use as evidence in your assignments; refer to them by their current correct names.
Common Misconceptions & Mistakes to Avoid
- Confusing health with merely the absence of disease, neglecting the multidimensional (physical, mental, social) aspects defined by the WHO.
- Overlooking the interplay of multiple factors affecting health, such as assuming genetics alone determines disease without considering lifestyle or environmental interactions.
- Misclassifying diseases by cause: e.g., stating all infections are bacterial and treatable with antibiotics, ignoring viral, fungal, or prion diseases.
- Failing to differentiate between prevention levels, for instance, confusing screening (secondary prevention) with health promotion (primary prevention).
- Believing patient self-management solely involves medication adherence, ignoring the importance of lifestyle modifications, monitoring symptoms, and accessing support networks.
- Mixing up the responsibilities of public health bodies, such as attributing clinical treatment to Public Health England (now UKHSA) instead of its advisory and protective role.
Examiner Marking Points
- Award credit for demonstrating a clear distinction between the holistic concept of health (physical, mental, social well-being) and the biomedical definition of disease (pathological abnormality).
- Award credit for identifying and explaining at least three factors affecting health, such as lifestyle, socioeconomic status, environment, and genetics, with relevant examples.
- Award credit for accurately classifying common causes of disease, including pathogens (bacteria, viruses, fungi), genetic mutations, and environmental hazards, with specific disease examples.
- Award credit for evaluating the effectiveness of disease prevention strategies, referencing primary, secondary, and tertiary prevention levels, and linking them to real-world public health initiatives.
- Award credit for demonstrating understanding of patient self-management by discussing tools like personalised care plans, patient education, and the principles of shared decision-making.
- Award credit for accurately describing the roles of at least two UK public health bodies (e.g., UK Health Security Agency, NHS England, local authorities) in protecting and improving health, with correct regulatory and advisory functions.