How to Write a Public Health Essay Social Determinants and Evidence Guide

The Scope of Public Health Academic Writing

Public health essays span epidemiology, health promotion, health policy, environmental health, global health, and health services research. The common thread is a population-level focus public health is concerned with the health of communities and populations rather than individual clinical care. This population perspective shapes everything about public health academic writing: the evidence used (population-level statistics, epidemiological studies, ecological data), the frameworks applied (social determinants, health equity, population intervention models), and the interventions discussed (policy, environmental, community, and educational approaches rather than individual clinical treatment).

Understanding which level of the socio-ecological model your essay operates at individual behaviour, interpersonal relationships, community, organisational, policy and environment is essential for choosing the right theoretical frameworks and the right evidence base. Most public health essays operate across multiple levels simultaneously.

Public Health Frameworks

The Ottawa Charter for Health Promotion (WHO, 1986) defines five action areas that remain foundational to public health practice: building healthy public policy, creating supportive environments, strengthening community action, developing personal skills, and reorienting health services. Apply these action areas analytically not as a list to describe but as an analytical framework to assess how a specific public health intervention or policy addresses (or fails to address) multiple determinants of health simultaneously.

The Lalonde Report (1974) introduced the health field concept identifying human biology, environment, lifestyle, and health care organisation as the four main determinants of health. The Dahlgren and Whitehead rainbow model (1991) visualises how individual lifestyle factors are embedded within social and community networks, which are in turn shaped by living and working conditions, and ultimately by socioeconomic, cultural, and environmental conditions. These models provide the theoretical architecture for most health determinants analysis in public health essays.

Social Determinants of Health

The social determinants of health are the conditions in which people are born, grow, live, work, and age shaped by the distribution of money, power, and resources. Key social determinants include income and socioeconomic status; education; employment and working conditions; food security and nutrition; housing and neighbourhood conditions; early childhood development; social support networks; and access to healthcare services. Public health essays addressing health inequalities must engage with these determinants specifically, not just with individual behaviours or healthcare access.

The Marmot Reviews Fair Society Healthy Lives (2010) and Health Equity in England (2020) are the most authoritative UK evidence syntheses on social determinants and health inequalities. The concept of proportionate universalism targeting resources proportionately across the social gradient rather than only at the most deprived is central to the Marmot approach and should be engaged with in essays addressing UK health inequality policy.

Public Health Evidence

Public health evidence spans multiple study designs and must be evaluated using appropriate epidemiological criteria. Systematic reviews and meta-analyses of public health interventions (the Cochrane Public Health Group and the Campbell Collaboration) provide the strongest evidence for intervention effectiveness. Randomised controlled trials where feasible provide causal evidence; many public health interventions cannot be ethically or practically randomised, making cohort studies, natural experiments, and ecological studies particularly important in the public health evidence base. The GRADE framework assesses the quality of public health evidence across the same dimensions as clinical evidence.

For UK population health data, use ONS health statistics, PHE (UKHSA) surveillance reports, NHS Digital health indicators, and the Health Survey for England. For global health data, WHO Global Health Observatory, IHME Global Burden of Disease, and UNDP Human Development Reports provide authoritative population health statistics.

Writing About Health Inequalities

Health inequalities essays must distinguish between health inequalities (the descriptive term differences in health outcomes between groups) and health inequity (the normative term health differences that are unjust, avoidable, and unnecessary). Not all health differences are inequitable some reflect genuine biological differences. Health inequities are systematically patterned by social determinants and reflect unjust social arrangements. This distinction between inequalities and inequities is fundamental to public health academic writing and is frequently blurred in student essays.

Intersectionality is increasingly important in health inequalities analysis. Health disadvantage results not from a single social characteristic (class, or race, or gender) but from the intersection of multiple social positions. A Black working-class woman experiences health disadvantage shaped by the simultaneous interaction of race, class, and gender not simply the sum of three separate disadvantages.

NICE Public Health Guidance

NICE public health guidance (identified by PH, NG, or QS prefixes depending on type) provides evidence-based recommendations for public health interventions and should feature in public health essays that address specific interventions or behaviours. NICE PH guidance covers topics including smoking cessation (PH10, NG209), physical activity (PH44), alcohol interventions (PH24), obesity (PH47, NG7), and many more. Always use the most current version of any NICE guideline, as recommendations are regularly updated as new evidence becomes available.

Common Public Health Essay Mistakes

• Individual-level analysis of population-level problems — public health essays that focus on individual behaviour change without addressing upstream determinants are applying a biomedical, not a public health, lens
• Conflating health inequalities and health inequities — not all health differences are inequitable; the distinction is fundamental
• Outdated epidemiological data — public health data changes regularly; always use the most current available statistics
• Ottawa Charter listed not applied — describing the Charter’s five action areas without applying them analytically to the specific intervention or policy under discussion is description, not analysis

CollePals.com has public health and epidemiology specialist writers who understand social determinants, health equity frameworks, and NICE public health guidance. Place your order today.