The March 2008 Commentary by Satcher and Higginbotham was more
notable for what it did not say than what it did (1). The authors claim
to present “the public health approach” (italicize "the" [emphasis mine])
to eliminating disparities in health without offering any strategies
directed at reducing what is widely understood to be the major underlying
cause: disparities in socio-economic status (SES) (2).
A true public health approach requires that we look beyond services
and programs and seek to address causal factors in policy, in the
environment, in our institutions, and in culture (3). Many health
problems – and certainly many health disparities – have their causal roots
in our economic system, in housing, in the jobs people do, in the natural
and built environment, in politics, and in institutional systems and
policies. The authors write that, “the public health approach must take
place in the context of a balanced community health system, which includes
health promotion, disease prevention, and early detection, moving towards
universal access to health care.” This is laudable, but incomplete.
Public health is a set of activities undertaken by society as a whole, and
not just those taken by a community health system (4).
In addition to the global omission of disparities in SES, the authors
omit some specific and critically important approaches to understanding
and addressing disparities. They promote school-based programs to address
nutrition, physical activity, and wellness, but they make no note of the
disparate funding structures upon which our public education system rests:
the property tax. The inequities inherent in this method of financing are
so glaring that several state courts have ruled it unconstitutional (5,6),
and yet it merits no discussion in this public health approach to
eliminating disparities. The authors write, "Human behavior is the single
most important determinant of variations in health outcomes," with no
reference to the literature documenting how little of the variation among
SES groups is actually explained by behavior (7). Nor is there any
mention or reference to the vast literature looking at the degree to which
behavior might be shaped by poverty and the environment.
There is no mention of the Barker hypothesis (8). The risk of
obesity and diabetes, and subsequent early death from cardiovascular
disease, are associated with low birth weight. This association may be
mediated not purely by differences in behavior linked to poverty, but to a
gene-environment interaction whereby scarcity in-utero increases the
biological propensity to horde calories. Such a mechanism, if proven to
be true, would have a profound effect on our understanding of and
ultimately our approach to disparities in risk for obesity and diabetes.
Most starkly, this hypothesis suggests that some behavioral tendencies
associated with poverty are created and sustained by factors outside of
the control of the individual, and that interventions directed at root
causes must transcend those directed at the specific time and place where
the outcomes are manifest.
This and many other potentially profound notions of how low
socioeconomic status and poor health might be linked are not touched upon
or referenced in this Commentary.
There was a time when public health leaders contributed to changing
the world. They helped create the water and sewer infrastructures that
sustain our cities. They waged a world wide campaign, both scientific and
political, that eliminated smallpox. They challenged the tobacco industry. And they participated actively in the 1960’s war on poverty. Now they
offer us programs. How sad.
References:
1. Satcher D, Higginbotham EJ. The Public Health Approach to
Understanding Disparities. Am J Public Health. 2008; 98: 400-403.
2. Evans, RG, Why Some People Are Healthy and Others Not?, The
Determinants of Health of Populations. Robert G. Evans, Morris L. Barer,
and Theodore R. Marmor, editors, Aldine de Gruyer, New York: 1994
3. Institute of Medicine. The Future of Public Health in the 21st
Century: National Academy Press; 2003
4. Institute of Medicine. The Future of Public Health: National
Academy Press; 1988
5. Blumenthal R. School Financing Fix Eludes Texas Lawmakers Again.
The New York Times. May 31, 2005; Section A, p.14
6. Russell J. N.H. School Funding Ruled Unconstitutional; Judge Says
Method Aids Communities Rich in Property. The Boston Globe. March 09,
2006; Metro/Region p. B2
7. Lantz PM, House JS, Lepkowsi JM, Williams DR, Mero RP, Chen J;
Socioeconomic Factors, Health Behaviors, and Mortality JAMA. June 3,
1998; 279(21): 1703 - 8
8. Barker, DJ. Adult consequences of fetal growth restriction. Clin
Obstet Gynecol. 2006 Jun ; 49(2):270-83