Biomedical & Social Models of Health & Health Promotion

The biomedical model focuses on treatment through physical and biological interventions, practiced by doctors for diagnosis, cure, and treatment of disease. The social model directs efforts toward social, economic, and environmental determinants through health promotion, targeting population groups. Biomedical model strengths include medical technology advancements extending life expectancy, but limitations include not promoting good health practices and inability to cure genetic diseases. Social model strengths include cost-effectiveness and targeting vulnerable populations, but limitations include ignored health promotion messages and inability to prevent genetic diseases.

The social model of health is a framework focused on preventing health conditions by addressing physical, sociocultural, and political environments, encouraging healthy behaviors through policies (like seat belt laws and smoking restrictions), education campaigns, and health promotion programs, as opposed to the biomedical approach which focuses on diagnosis, treatment, and cure; its strengths include promoting healthy behaviors and being more cost-effective than biomedical approaches, while limitations include inability to prevent genetic conditions or treat existing illnesses, and the fact that people may ignore health education information.

The biomedical model views the body as a machine that breaks down due to biological pathogens (viruses, bacteria, genetics), focusing on physical causes of disease. In contrast, the sociological model emphasizes social determinants including socioeconomic status, education, income, environment, occupation, and cultural beliefs. The biomedical model is considered narrow and limited, while the sociological model provides comprehensive understanding that health outcomes are shaped by social factors. For example, disease vulnerability is not merely biological but deeply rooted in social and economic conditions like poverty, nutrition, and access to healthcare.

The biomedical model focuses exclusively on physical and biological aspects of disease, diagnosis, cure, and treatment, practiced primarily by doctors and health professionals, while the social model addresses social, economic, and environmental determinants of health through prevention and broader community involvement, thereby reducing the burden on healthcare systems.

The biomedical model assumes disease is fully accounted for by measurable biological variables, leaving little room for social, psychological, and behavioral dimensions. It embraces mind-body dualism, separating mental from somatic aspects. This model is inadequate for diseases where psychological and social factors are dominant. In 1977, Dr. George Engel called for a biopsychosocial approach, recognizing that boundaries between health and disease are affected by cultural, social, and psychological considerations. This perspective was not new—physicians had recognized mental factors in treatment since ancient times.

The social-ecological model of health integrates multiple levels of influence on health: (1) Individual level - personal behaviors and characteristics, (2) Interpersonal level - relationships and social networks, (3) Community level - social and physical environment, (4) Societal level - policies and systems. This model recognizes that health outcomes result from complex interactions across multiple levels of influence.

The social ecological model provides a framework for understanding health behavior by examining multiple levels of influence: individual (personal attributes, behaviors), interpersonal (relationships, social networks), organizational (institutions, settings), community (neighborhoods, social systems), and policy (laws, regulations, societal norms). The model assumes a multi-dimensional focus on both physical and social environments, along with personal attributes, and emphasizes person-environment fit. Four key principles include: multiple factors influence health behavior at each level, factors interact across levels requiring multi-level interventions, multi-level interventions are most effective, and models are most powerful when behavior-specific. Using HIV testing and tobacco use as examples, the model demonstrates how effective interventions must address multiple levels simultaneously.

The social ecological model is a framework that recognizes multiple levels influencing health outcomes. It includes four levels: (1) Individual level - biological, cognitive, perceptual, and behavioral factors; (2) Network level - social networks including family, sexual, and drug-using networks that influence health through social support and social capital; (3) Community/neighborhood level - access to prevention resources, treatment services, healthy foods, parks, sport facilities, and physical exposures like air pollution and noise; (4) Public policy/macrosystem level - economic indicators, policies such as soda taxes that promote healthy behaviors or decrease risks.

The Social Ecological Model is the most comprehensive framework for understanding health because it looks at all hierarchical levels from individual through policy and political context. While other models focus on specific levels (like the Trans Theoretical Model at individual level), the SEM provides an integrated view of how multiple interrelated factors influence health behaviors and outcomes. This systems approach recognizes that effective public health interventions often need to address multiple levels simultaneously to achieve meaningful behavior change.

Social ecological models represent a comprehensive framework that examines health behavior across multiple levels of influence, from micro-level individual factors through meso-level relationships to macro-level structural and policy factors. These models recognize that individuals are multiply influenced by physiological pathways, individual risks, social relationships, institutions, and broader social and economic policies. While current research often treats these levels as separate categories for intervention, the future direction involves understanding the dynamics between levels—how social influences shape individual behavior and vice versa—rather than treating them as independent domains.

In health promotion, a mixed methods approach combines both qualitative and quantitative information for evaluation. This approach helps determine whether interventions were successful, enabling decisions about continuing, scaling up programs, securing funding from funders, and sharing successful strategies with others in different settings.

Everything done in health promotion deserves to be evaluated. Monitoring and evaluation must be done collaboratively and participatively, involving everyone. The range of possibilities within diverse territories requires interdisciplinary and interprofessional approaches. Both quantitative and qualitative indicators should be used together without competition, as they provide complementary perspectives on program effectiveness.

Effective health promotion requires measurable and evaluative strategies rather than simply distributing materials. Health education programs must be systematically planned, measured, and evaluated to assess their effectiveness and make necessary adjustments.

Eight essential indicators for evaluating health promotion programs include: (1) Knowledge, attitudes, motivation, and behavioral tendencies related to health, (2) Community participation and social influence, (3) Public health policies including political statements and resource allocation, (4) Health conditions and healthy lifestyle factors including access to healthy food, (5) Service effectiveness including healthcare access and social-cultural factors, (6) Healthy environment including access to substances like tobacco, alcohol, and drugs, (7) Social impact including quality of life, independence, social networks, and equity, and (8) Health impact including reduction in illness, mortality, and disability.

Health promotion strategies typically include: (1) Policy change - modifying systems to support health (e.g., school nutrition policies); (2) Environmental changes - modifying physical or social environments (e.g., removing vending machines from schools); (3) Personal skill development - building individual capabilities (e.g., teaching proper brushing techniques). These strategies address health at different levels: individual, community, and systemic. Effective projects often combine multiple strategies for comprehensive impact. Projects must clearly define both the population (who) and the issue (what) they address. The population can be individuals, families, communities, or entire populations. The issue can range from specific health conditions to broader social determinants like income, education, or social support.

In collective health, it is important to distinguish between equality and equity. Equality means giving everyone the same resources, but this approach fails for those who have fewer conditions to access resources. Equity means giving more to those who need it most, reducing barriers for vulnerable populations. The goal is to decrease barriers for those with more vulnerability, recognizing that equal treatment does not produce equal outcomes.

Equity differs fundamentally from equality: equality means everyone receives the same resources, while equity means everyone receives what they need to succeed. Using a bike-riding analogy, equality gives everyone the same bike, but equity provides appropriate bikes for different needs—accessible bikes for wheelchair users, appropriately sized bikes for children. Health opportunities and barriers relate to income, gender, race, geography, physical ability, age, and sexual orientation. Historical discriminatory housing and zoning policies intentionally segregated America, creating lasting patterns of inequality where some groups experience lifetime benefits while others face burdens unrelated to their effort or education.

Health equity differs from equality in that it requires giving each person what they need to achieve the same health outcomes, rather than distributing resources equally regardless of individual circumstances. Health inequities are differences that are unnecessary, avoidable, arbitrary, and unjust, stemming from structural inequalities in society rather than natural biological variations or personal lifestyle choices. Barriers to healthcare access include geographic (physical obstacles), economic (cost-related), administrative (bureaucratic), and cultural/symbolic (discrimination, cultural insensitivity) barriers. Achieving health equity requires addressing both social determinants of health through public policies and improving healthcare system accessibility, quality, and cultural acceptability.

Health equity means everyone has a fair and just opportunity to be healthy, requiring removal of obstacles like poverty and discrimination. Unlike equality (same solution for all), equity acknowledges different starting points and needs. The five fundamental drivers of health inequity include historical/structural harms, access to wealth and resources, access to healthy environments, service quality, and governance structures. Laws and policies have created today's health disparities but can also transform them through intentional intervention targeting these structural drivers.

This section explores the critical distinction between health equality and health equity. Health equality means providing identical treatment and resources to everyone regardless of circumstances, while health equity means providing specific resources tailored to individuals' specific needs. The latter addresses root causes of social injustice preventing marginalized populations from receiving necessary services. Systemic barriers include Western European-centric healthcare frameworks that overlook diverse community needs, leading to oppression of those outside these frames. Understanding this distinction is essential for developing long-term solutions that create policies and services addressing underlying structural issues rather than surface-level disparities.