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Population health has been defined as “the health outcomes of a group of individuals, including the distribution of such outcomes within the group.”^[1] It is an approach to health that aims to improve the health of an entire population. One major step in achieving this aim is to reduce health inequities among population groups. Population health seeks to step beyond the individual-level focus of mainstream medicine and public health by addressing a broad range of factors that impact health on a population-level, such as environment, social structure, resource distribution, etc. An important theme in population health is importance of social determinants of health and the relatively minor impact that medicine and healthcare have on improving health overall.

From a population health perspective, health has been defined not simply as a state free from disease but as "the capacity of people to adapt to, respond to, or control life's challenges and changes".^[2]

Contents 1 The role of economic inequality 2 The importance of family planning programs 3 Population health management (PHM) 4 See also 5 References 6 Further reading 7 External links

[edit] The role of economic inequality

Recently, there has been increasing interest from epidemiologists on the subject of economic inequality and its relation to the health of populations. There is a very robust correlation between socioeconomic status and health. This correlation suggests that it is not only the poor who tend to be sick when everyone else is healthy, but that there is a continual gradient, from the top to the bottom of the socioeconomic ladder, relating status to health. This phenomenon is often called the "SES Gradient". Lower socioeconomic status has been linked to chronic stress, heart disease, ulcers, type 2 diabetes, rheumatoid arthritis, certain types of cancer, and premature aging. Despite the reality of the SES Gradient, there is debate as to its cause. A number of researchers (A. Leigh, C. Jencks, A. Clarkwest - see also Russell Sage working papers) see a definite link between economic status and mortality due to the greater economic resources of the better-off, but they find little correlation due to social status differences.

Other researchers such as Richard Wilkinson, J. Lynch, and G.A. Kaplan have found that socioeconomic status strongly affects health even when controlling for economic resources and access to health care. Most famous for linking social status with health are the Whitehall studies - a series of studies conducted on civil servants in London. The studies found that, despite the fact that all civil servants in England have the same access to health care, there was a strong correlation between social status and health. The studies found that this relationship stayed strong even when controlling for health-affecting habits such as exercise, smoking and drinking. Furthermore, it has been noted that no amount of medical attention will help decrease the likelihood of someone getting type 1 diabetes or rheumatoid arthritis - yet both are more common among populations with lower socioeconomic status. Lastly, it has been found that amongst the wealthiest quarter of countries on earth (a set stretching from Luxembourg to Slovakia) there is no relation between a country's wealth and general population health ^[1] - suggesting that past a certain level, absolute levels of wealth have little impact on population health, but relative levels within a country do. The concept of psychosocial stress attempts to explain how psychosocial phenomenon such as status and social stratification can lead to the many diseases associated with the SES Gradient. Higher levels of economic inequality tend to intensify social hierarchies and generally degrades the quality of social relations - leading to greater levels of stress and stress related diseases. Richard Wilkinson found this to be true not only for the poorest members of society, but also for the wealthiest. Economic inequality is bad for everyone's health. Inequality does not only affect the health of human populations. David H. Abbott at the Wisconsin National Primate Research Center found that among many primate species, less egalitarian social structures correlated with higher levels of stress hormones among socially subordinate individuals. Research by Robert Sapolsky of Stanford University provides similar findings.

[edit] The importance of family planning programs

Family planning programs (including contraceptives) play a major role in population health. For example, the United States Agency for International Development lists as benefits of its international family planning program:^[3]

• "Protecting the health of women by reducing high-risk pregnancies"
• "Protecting the health of children by allowing sufficient time between pregnancies"
• "Fighting HIV/AIDS through providing information, counseling, and access to male and female condoms"
• "Reducing abortions"
• "Supporting women's rights and opportunities for education, employment, and full participation in society"
• "Protecting the environment by stabilizing population growth"

[edit] Population health management (PHM)

One method to improve population health is population health management (PHM), which has been defined as “the technical field of endeavor which utilizes a variety of individual, organizational and cultural interventions to help improve the morbidity patterns (i.e., the illness and injury burden) and the health care use behavior of defined populations”.^[4] PHM is distinguished from disease management by including more chronic conditions and diseases, by use of "a single point of contact and coordination," and by "predictive modeling across multiple clinical conditions".^[5] PHM is considered broader than disease management in that it also includes "intensive care management for individuals at the highest level of risk" and "personal health management... for those at lower levels of predicted health risk.".^[6] Many PHM-related articles are published in Population Health Management, the official journal of DMAA: The Care Continuum Alliance.^[7]

[edit] See also

• Auxology
• Community health
• Economic inequality
• Health disparities
• Health Impact Assessment
• Inequality in disease
• List of countries by income equality
• Population Health Forum
• Social determinants of health
• popHealth

[edit] References

[edit] Further reading

• Lopez AD, Mathers CD, Ezzati M, Jamison DT, Murray CJ (May 27, 2006). "Global and regional burden of disease and risk factors, 2001: systematic analysis of population health data". Lancet 367 (9524): 1747–1757. doi:10.1016/S0140-6736(06)68770-9. PMID 16731270. http://www.fic.nih.gov/news/fogarty/2006/dcpp_lancet_367.pdf. 

[edit] External links

• Population Health MS and PhD Graduate Programs MS and PhD Graduate Programs in Population Health at the University of Wisconsin–Madison
• Population Health Institute Population Health Institute at the University of Wisconsin–Madison
• Canadian Institute for Health Information
• Institute of Population Health Institute of Population Health at the University of Ottawa, Canada
• Examples of population based health management metrics Population Based Health intervention analysis, business case evaluations, epidemiology
• Population and Health Graduate Program Population and Health Graduate Program in the Dept of Population and Family Health Sciences at the Johns Hopkins Bloomberg School of Public Health
• Population Health Forum website
• A Population-Based Risk Management Framework for Cancer Control
• Public Health Agency of Canada's take on population health
• Canadian Policy Research Secretariate report on population health
• Private Sector Partnerships for Better Health
• Ph.D. in Population Health Program Ph.D. in Population Health Program at the University of Ottawa, Canada
• MS Programs & PhD in Population Health Sciences At Thomas Jefferson University School of Population Health, Philadelphia, PA

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