Christopher Boorse’s biostatistical theory of medical disorder claims that biological part-dysfunction (i.e., failure of an internal mechanism to perform its biological function), a factual criterion, is both necessary and sufficient for disorder. Jerome Wakefield’s harmful dysfunction analysis of medical disorder agrees that part-dysfunction is necessary but rejects the sufficiency claim, maintaining that disorder also requires that the part-dysfunction causes harm to the individual, a value criterion. In this paper, I present two considerations against the sufficiency claim. First, I (...) analyze Boorse’s central argument for the sufficiency claim, the “pathologist argument,” which takes pathologists’ intuitions about pathology as determinative of medical disorder and conclude that it begs the question and fails to support the sufficiency claim. Second, I present four counterexamples from the medical literature in which salient part-dysfunctions are considered nondisorders, including healthy disease carriers, HIV-positive status, benign mutations, and situs inversus totalis, thus falsifying the sufficiency claim and supporting the harm criterion. (shrink)

Similarly to other accounts of disease, Christopher Boorse’s Biostatistical Theory (BST) is generally presented and considered as conceptual analysis, that is, as making claims about the meaning of currently used concepts. But conceptual analysis has been convincingly critiqued as relying on problematic assumptions about the existence, meaning, and use of concepts. Because of these problems, accounts of disease and health should be evaluated not as claims about current meaning, I argue, but instead as proposals about how to define (...) and use these terms in the future, a methodology suggested by Quine and Carnap. I begin this article by describing problems with conceptual analysis and advantages of “philosophical explication,” my favored approach. I then describe two attacks on the BST that also question the entire project of defining “disease.” Finally, I defend the BST as a philosophical explication by showing how it could define useful terms for medical science and ethics. (shrink)

Antoine C. Dussault Cet article renforce l’objection des dysfonctions bénignes soulevée par Jerome Wakefield contre la théorie biostatistique de Christopher Boorse, en en présentant une version qui prend acte d’une critique importante de l’analyse conceptuelle comme visée pour une théorie de la santé et de la pathologie. Cette objection prend pour cible la considération, par la théorie de Boorse, que la dysfonction de la partie d’un organisme est suffisante pour la pathologie de cet organisme. Situant sa critique dans le cadre (...) méthodologique de l’analyse conceptuelle, Wakefield soutient que cet aspect de la théorie de Boorse pose problème au regard des dysfonctions qui, parce qu’elles sont bénignes, ne sont pas considérées comme pathologiques par la médecine. Je présente une version de l’objection des dysfonctions bénignes intégrant les apports méthodologiques de l’explication philosophique telle que caractérisée par Peter Schwartz. Je fais valoir que sa considération des dysfonctions bénignes comme pathologiques fait échouer la théorie de Boorse à rendre compte de la portée pratique qu’ont les concepts de santé et de pathologie dans la médecine occidentale. (shrink)

There has been much debate about whether the concept of disease articulated in Boorse’s biostatistical theory is value-neutral or value-laden. Here, I want to examine whether this debate matters. I suggest that there are two basic respects in which value-ladenness might be important: it could threaten either scientific legitimacy or moral permissibility. I argue that value-ladenness does not threaten the scientific legitimacy of our disease-concept because the concept makes little difference to the formulation and testing of scientific hypotheses. (...) Likewise, even if our disease-concept is value-laden, this does not show it is morally impermissible. To determine its permissibility, we must regard it as a tool to structure social institutions. Seen in that way, whether our disease-concept is morally permissible is a consequentialist matter and depends exquisitely on unanswered empirical questions. (shrink)

This paper examines the most influential naturalist theory of health, Christopher Boorse’s ‘biostatistical theory’ . I argue that the BST is an unsuitable candidate for the rôle that Boorse has cast it to play, namely, to underpin medicine with a theoretical, value-free science of health and disease. Following the literature, I distinguish between “real” changes and “mere Cambridge changes” in terms of the difference between an individual’s intrinsic and relational properties and argue that the framework of the (...) BST essentially implies a Cambridge-change criterion. The examination reveals that this implicit criterion commits the BST to the troubling view that an individual could go from being diseased to healthy, or vice versa, without any physiological change in that individual. Two problems follow: the current framework of the BST is ill-equipped to formally embrace Cambridge changes and it is theoretically dubious. The arguments advanced here are not limited to the BST; I suggest they extend to any naturalist claim to underpin medical practice with a value-free theory of health and disease defined in terms of an evolutionary view of biological fitness. (shrink)

Drawing on Christopher Boorse's Biostatistical Theory (BST), Norman Daniels contends that a genuine health need is one which is necessary to restore normal functioning – a supposedly objective notion which he believes can be read from the natural world without reference to potentially controversial normative categories. But despite his claims to the contrary, this conception of health harbors arbitrary evaluative judgments which make room for intractable disagreement as to which conditions should count as genuine health needs and therefore (...) which needs should be met. I begin by offering a brief summary of Boorse's BST, the theory to which Daniels appeals for providing the conception of health as normal functioning upon which his overall distributive scheme rests. Next, I consider what I call practical objections to Daniels's use of Boorse's theory. Finally I recount Elseljin Kingma's theoretical objection to Boorse's BST and discuss its impact on Daniels's overall theory. Though I conclude that Boorse's view, so weakened, will no longer be able to sustain the judgments which Daniels's theory uses it to reach, in the end, I offer Daniels an olive branch by briefly sketching an alternative strategy for reaching suitably objective conclusions regarding the health and/or disease status of various conditions. (shrink)

Drawing on Christopher Boorse's Biostatistical Theory (BST), Norman Daniels contends that a genuine health need is one which is necessary to restore normal functioning – a supposedly objective notion which he believes can be read from the natural world without reference to potentially controversial normative categories. But despite his claims to the contrary, this conception of health harbors arbitrary evaluative judgments which make room for intractable disagreement as to which conditions should count as genuine health needs and therefore (...) which needs should be met. I begin by offering a brief summary of Boorse's BST, the theory to which Daniels appeals for providing the conception of health as normal functioning upon which his overall distributive scheme rests. Next, I consider what I call practical objections to Daniels's use of Boorse's theory. Finally I recount Elseljin Kingma's theoretical objection to Boorse's BST and discuss its impact on Daniels's overall theory. Though I conclude that Boorse's view, so weakened, will no longer be able to sustain the judgments which Daniels's theory uses it to reach, in the end, I offer Daniels an olive branch by briefly sketching an alternative strategy for reaching suitably objective conclusions regarding the health and/or disease status of various conditions. (shrink)

Critical Thinking in Clinical Research explains the fundamentals of clinical research in a case-based approach. The core concept is to combine a clear and concise transfer of information and knowledge with an engagement of the reader to develop a mastery of learning and critical thinking skills. The book addresses the main concepts of clinical research, basics of biostatistics, advanced topics in applied biostatistics, and practical aspects of clinical research, with emphasis on clinical relevance across all medical specialties.

Contemporary philosophy of health has been quite focused on the problem of determining the nature of the concepts of health, illness and disease from a scientific point of view. Some theorists claim and argue that these concepts are value-free and descriptive in the same sense as the concepts of atom, metal and rain are value-free and descriptive. To say that a person has a certain disease or that he or she is unhealthy is thus to objectively describe this person. On (...) the other hand it certainly does not preclude an additional evaluation of the state of affairs as undesirable or bad. The basic scientific description and the evaluation are, however, two independent matters, according to this kind of theory. Other philosophers claim that the concept of health, together with the other medical concepts, is essentially value-laden. To establish that a person is healthy does not just entail some objective inspection and measurement. It presupposes also an evaluation of the general state of the person. A statement that he or she is healthy does not merely imply certain scientific facts regarding the person’s body or mind but implies also a (positive) evaluation of the person’s bodily and mental state. My task in this paper will be, first, to present the two principal rival types of theories and present what I take to be the main kind of reasoning by which we could assess these theories, and second, to present a deeper characterization of the principal rival theories of health and illness. (shrink)

This essay replies to critics since 1995 of my “biostatistical theory” of health. According to the BST, a pathological condition is a state of statistically species-subnormal biological part-functional ability, relative to sex and age. Theoretical health, the total absence of pathological conditions, is then a value-free scientific notion. Recent critics offer a mixture of old and new objections to this analysis. Some new ones relate to choice of reference class, situation-specificity of function, common diseases and healthy populations, improvements (...) in population health, the practice of pathologists, “Cambridge changes” in health status, and comparative vs. absolute health concepts. I make no changes in doctrine, except to consider treating “normal aging” as pathological by taking young adults as the standard for all adults. (shrink)

Boorse’s biostatistical theory states that diseases should be defined in ways that reflect disturbances of biological function and that are objective and value free. We use three examples from contemporary medicine that demonstrate the complex issues that arise when defining the boundaries of disease: polycystic ovary syndrome, chronic kidney disease, and myocardial infarction. We argue that the biostatistical theory fails to provide sufficient guidance on where the boundaries of disease should be drawn, contains ambiguities relating to (...) choice of reference class, and is out of step with medical processes for identifying disease boundaries. Although proponents of the biostatistical theory might regard these practical issues as irrelevant to the aim of providing a theoretical account of disease, we take them to indicate the need for a theoretical account that is adequate for current needs—including limiting new forms of medicalization that are driven by the identification of disease based on dysfunction. Our processes for determining the boundaries for disease need to recognize that there is no value-free method for making these decisions. (shrink)

Christopher Boorse’s Biostatistical Theory of Health has been the main contender among naturalistic accounts of health for the last 40 years. Yet, a recent criticism of this theory, presented by Elselijn Kingma, identifies a dilemma resulting from the BST’s conceptual linking of health and statistical typicality. Kingma argues that the BST either cannot accommodate the situation- specificity of many normal functions or cannot account for many situation-specific diseases. In this article, we expand upon with Daniel Hausman’s response (...) to Kingma’s dilemma. We propose that recalling Boorse’s specification that health is an intrinsic property of its bearers and explicating this intrinsic property in relation to the concept of homeostasis can illuminate how proponents of naturalistic accounts of health should deal with the situation- specificity of normal functions. We argue that beyond what Boorse and Hausman have delineated, the situation- specificity of normal function cannot be fully captured in a simple dichotomy between normal and abnormal environment or between relevant and irrelevant situations. By bringing homeostasis to the fore of the analysis of health, we set out a richer picture of what the various situations that affect living organisms’ functional performance can be. Accordingly, we provide a broader classification of these various situations which, we contend, better accounts for the main intuitions that philosophers of medicine have sought to accommodate than previous naturalistic theories of health. (shrink)

What is considered normal determines clinical practice in medicine and has implications at an individual level, doctor-patient relationship and health care policies. With the increase in medical information and technical abilities it is urgent to have a clear concept of normality in medicine so that crucial discussions can be held with unequivocal terms.The different meanings for normality were analyzed throughout the literature and grouped according to their relevance in the academic community in models, namely the Biostatistical Theory (BST), (...) Health, Ideal, Process and Biological advantage. The BST is the most established naturalistic approach, however normal variability can arguably constitute a problem. Health is similar and raises the question of setting the boundaries of pathology. Normality as an Ideal is an useful tool but is naturally unrealistic. As a Process it is comprehensible but is hard to frame for practical purposes. If considered as a Biological Advantage, seems intuitive but abnormality should tend to disappear.After, three examples were presented to discuss these models. They were Anemia, Psychiatric diseases and Psychopathy. In the case of Anemia the BST was applied and the arbitrary boundaries but with social impact were exposed. Psychiatric diseases was discussed under the process of self-organization and non-suffering ideal. With Psychopathy the boundaries of biological advantage are questioned.This review appeals to the importance of redesigning of the concept of normality in medicine according to current times and stresses the importance of integrating concepts such as variability and autonomy. (shrink)

We sketch a novel and improved version of Boorse’s biostatistical theory of functions. Roughly, our theory maintains that (i) functions are non-negligible contributions to survival or inclusive fitness (when a trait contributes to survival or inclusive fitness); (ii) situations appropriate for the performance of a function are typical situations in which a trait contributes to survival or inclusive fitness; (iii) appropriate rates of functioning are rates that make adequate contributions to survival or inclusive fitness (in situations appropriate (...) for the performance of that function); and (iv) dysfunction is the inability to perform a function at an appropriate rate in appropriate situations. Based on our theory, we sketch solutions to three problems that have afflicted Boorse’s theory of function, namely, Kingma’s ([2010]) problem of the situation-specificity of functions, the problem of multi-functional traits, and the problem of how to distinguish between appropriate and inappropriate rates of functioning. (shrink)

This essay develops an account of health, the functional efficiency theory, which derives from Christopher Boorse's biostatistical theory. Like the BST, the functional efficiency theory is a nonevaluative view of health, but unlike the BST, it argues that the fundamental theoretical task is to distinguish levels of efficiency with which the parts and processes within organisms and within systems within organisms function. Which of these to label as healthy or pathological is of secondary importance. Because the (...) statistical distributions that Boorse's account relies on are distributions of functional efficiency, the functional efficiency theory arguably complements rather than challenges the BST. (shrink)

In, I argued that Boorse's biostatistical theory of health is unable to accommodate diseases that are the normal result of harmful environments. Hausman disagrees: if the BST compares normal dispositional function against the whole population or reference class, rather than against organisms in similar circumstances as I proposed, then my challenge can be avoided. In this paper, I argue that Hausman's response fails: his proposal cannot accommodate a series of common physiological processes, such as sleep and those involved (...) in reproduction. In the course of this argument, I also offer a detailed discussion of the concept of functional efficiency, and reveal a link between the problem of environments and that of reference classes. 1 Introduction2 Kingma on Boorse3 Hausman on Kingma4 Response to Hausman5 Three Possible Replies5.1 Reference classes5.2 Temporary pathologies5.3 Adequacy of function6 Concluding Discussion. (shrink)

This essay argues that what is central to Christopher Boorse’s biostatistical theory of disease as statistically subnormal part function (BST) are comparisons of the “functional efficiency” of parts and processes and that statistical considerations serve only to pick out a healthy level of functional efficiency. On this interpretation, the distinction between health and pathology is less important than comparisons of functional efficiency, which are entirely independent of statistical considerations. The clarifications or revisions of the BST that this essay (...) offers are friendly amendments that render moot some of the most prominent criticisms of Boorse’s account. (shrink)

This paper is a response to Christopher Boorse's recent defense of his Biostatistical Theory of health and disease. Boorse maintains that his concept of theoretical health and disease reflects the "considered usage of pathologists." I argue that pathologists do not use "disease" in the purely theoretical way that is required by the BST. Pathology does not draw a sharp distinction between theoretical and practical aspects of medicine.

Two decades ago, the eminent evolutionary biologist George C. Williams and his physician coauthor, Randolph Nesse, formulated the evolutionary medicine research program. Williams and Nesse explicitly made adaptationism a core component of the new program, which has served to undermine the program ever since, distorting its practitioners’ perceptions of evidentiary burdens and in extreme cases has served to warp practitioner’s understandings of the relationship between evolutionary benefits/detriments and medical ones. I show that the Williams and Nesse program more particularly embraces (...) the panselectionist variety of adaptationism (the empirical assumption that non-adaptive evolutionary processes are causally unimportant compared to natural selection), and argue that this has harmed the field. Panselectionism serves to conceal the enormous evidentiary hurdles that evolutionary medicine hypotheses face, making them appear stronger than they are. I use two examples of evolutionary medicine texts, on neonatal jaundice and on asthma, to show that some evolutionary medicine practitioners have allowed their fervent panselectionism to directly shape their recommendations for clinical practice. I argue that this escalation of panselectionism’s influence is inappropriate under Williams’ and Nesse original stated standards, despite being inspired by their program. I also show that the examples’ conflation of clinical and evolutionary considerations is inappropriate even under Christopher Boorse’s controversial evolution-rooted concepts of disease and health. (shrink)

Elselijn Kingma argues that Christopher Boorse’s biostatistical theory does not show how the reference classes it uses—namely, age groups of a sex of a species—are objective and naturalistic. Boorse has replied that this objection is of no concern, because there are no examples of clinicians’ choosing to use reference classes other than the ones he suggests. Boorse argues that clinicians use the reference classes they do because these reflect the natural classes of organisms to which their patients belong. (...) Drawing on a thorough exploration of how the disease osteoporosis is defined in adults, I argue that clinicians do indeed make choices about which reference classes to use in diagnosis. Clinicians use young adult reference classes to diagnose osteoporosis in elderly patients. They also use young female reference classes to diagnose osteoporosis in elderly males. Clinicians adjust their reference classes so that the diagnosis of osteoporosis reflects a person’s risk of sustaining a fragility fracture. The ethical intuition that people with the same risk of fracture should receive the same diagnosis overwhelms the naturalistic intuition that reference classes should reflect natural classes of organisms of uniform functional design. Clinicians construct a variety of reference class types, including pathological reference classes and epidemiological population-specific reference classes, to serve this ethical intuition. I show how clinicians use several reference classes at once so that they can more accurately predict risk of fracture. Ultimately, the reference classes chosen and used in medical practice are quite different from those proposed in naturalistic philosophy of medicine. (shrink)

"An important contribution to contemporary jurisprudential debate and to legal thought more generally, Just Interpretations is far ahead of currently available work."--Peter Goodrich, author of Oedipus Lex "I was struck repeatedly by the clarity of expression throughout the book. Rosenfeld's description and criticism of the recent work of leading thinkers distinguishes his work within the legal theory genre. Furthermore, his own theory is quite original and provocative."--Aviam Soifer, author of Law and the Company We Keep.

This essay provides an account of how to distinguish between health and pathology of trait tokens in medical theory. It proposes to distinguish between two health/pathology concepts—health/pathology pertaining to survival and health/pathology pertaining to reproduction. It defines measures for survival-efficiency and reproduction-efficiency of performances of physiological functions. It provides an account of how, using the efficiency measures, to draw the line between health and pathology. The account draws, but seeks to improve, on Christopher Boorse’s biostatistical theory. In (...) relation to that theory, the suggested account has the advantages that it defines efficiency and that it harmonizes with judgments in medical theory in cases of common diseases and “normal aging.” Furthermore, the essay argues against a competing idea of how to improve on the biostatistical theory, advocated by Peter Schwartz and Daniel Hausman. (shrink)

Elselijn Kingma argues that Christopher Boorse’s biostatistical theory (the BST) does not show how the reference classes it uses are objective and naturalistic. Recently, philosophers of medicine have attempted to rebut Kingma’s concerns. I argue that these rebuttals are theoretically unconvincing, and that there are clear examples of physicians adjusting their reference classes according to their prior knowledge of health and disease. I focus on the use of age-adjusted reference classes to diagnose low bone mineral density in children. (...) In addition to using the BST’s age, sex, and species, physicians also choose to use other factors to define reference classes, such as pubertal status, bone age, body size, and muscle mass. I show that physicians calibrate the reference classes they use according to their prior knowledge of health and disease. Reference classes are also chosen for pragmatic reasons, such as to predict fragility fractures. (shrink)

I argue that ductal carcinoma in situ (DCIS), the tumor most commonly diagnosed by breast mammography, cannot be confidently classified as cancer, that is, as pathological. This is because there may not be dysfunction present in DCIS—as I argue based on its high prevalence and the small amount of risk it conveys—and thus DCIS may not count as a disease by dysfunction-requiring approaches, such as Boorse’s biostatistical theory and Wakefield’s harmful dysfunction account. Patients should decide about treatment for (...) DCIS based on the risks it poses and the risks and benefits of treatment, not on its disease status. (shrink)

There is a conceptual crisis in the biomedical sciences that is particularly salient in psychopathology research. Underlying the crisis is a controversy that pertains to the current medical model of disease that largely draws from causal-mechanistic explanations. The bedrock of this model is the analysis of biological part-dysfunctions that aims at unequivocally defining a pathological condition and demarcating it from its neighboring entities. This endeavor has led to a quest for physiological, biochemical, and genetic signatures. Yet, so far there is (...) little evidence for reliable biomarkers for any mental disorder. The contemporary biomedical paradigm largely ignores historical, dynamic, and system-level aspects—a view that has contributed much to the conceptual disjunction of the patient as a person from his/her disease. Notwithstanding the impressive progress in the biomedical sciences, increasingly more critics question whether the constituting framework is sufficient to convey a comprehensive understanding of illnesses, especially mental illnesses. Thus, the medical model urgently requires an update. But rather than revamping it by methodological advancements, it will be necessary to critically review its philosophical roots. The most problematic issues that require reworking are: the preponderance of the biostatistical theory; the undue decoupling of physiological from evolutionary explanations of function; the clinging to the Modern Synthesis ; and the neglect of dynamic and system-level properties. The proposed overhaul requires the heeding of historical explanations that draw from the Extended Evolutionary Synthesis as well as systems biology approaches for tackling multilevel and dynamic phenomena of complex systems. (shrink)

What is it to have a mental disorder? The paper proposes an ability-based view of mental disorder. It argues that such a view is preferable to biological dysfunction views such as Wakefield’s Harmful Dysfunction Analysis and Boorse’s Biostatistical Theory. According to the proposed view, having a mental disorder is basically a matter of having a certain type of inability (or: an ability that is not sufficiently high): the inability to respond adequately to some of one’s available reasons in (...) some of one’s reasons-sensitive attitudes or actions, where the threshold of inability is determined by one’s being harmed. The relevant concepts of inability, reasons, and harm are sketched. The paper argues that the proposed view evades some problems of biological dysfunction views by remaining neutral on questions of causation and the evolution of the mind. Furthermore, it can capture better what is distinctively “mental” about mental disorder. On the proposed view, it is the rational relations among an individual’s attitudes and actions that are “disordered” and the relevant norms in mental disorder are the norms of reasons. As further merits, the view can account for degrees of disorder, incorporate biological as well as social aspects, and elucidate the relations among disorders, symptoms, and their causes. (shrink)

In the present paper it is argued that genetic interventions on human embryos are in principle permissible if they promote the health of the persons that these embryos will one day become and impermissible if they compromise their health. This so called health-intervention principle is reached by, inter alia, rejecting alternative approaches to the problem of the permissibility of genetic intervention. The health-intervention principle can be interpreted in different ways depending on how the notion of health is understood. The central (...) part of the paper is an attempt to find a concept of health which is such that it makes the health-intervention principle normatively plausible. For this purpose I examine two influential competing theories of health: Cristopher Boorse’s biostatistical theory of health and Lennart Nordenfelt’s welfare theory of health. I argue that the health-intervention principle is more plausible if health is understood in the latter sense, although it is not ruled out that the principle may be given an even more plausible explication in terms of some other notion of health. (shrink)

Even though medics in the present day may think that clinical pathology is derived from normal physiology, I argue here that this is not necessarily the case. Historically, physiology may have been derived from clinical pathology. After deriving physiological knowledge like this, medics can reverse the conceptual priority, to make believe that physiological knowledge is at the foundation of medical practice. This implies that supposedly objective physiological knowledge can be influenced by the evaluative judgements made to define practical concepts of (...) clinical pathology. I argue for this view using the history of the disease heart failure, drawing on an argument made by Georges Canguilhem. (shrink)

La possibilité d’une définition naturaliste de la santé et d’une distinction entre le normal et le pathologique qui ne repose pas sur des normes culturelles, sociales ou subjectives est au cœur des débats en philosophie de la médecine. Or le concept statistique de la normalité, fondamental pour une définition objective de la santé, soulève d’importantes difficultés. Christopher Boorse défend une « théorie bio-statistique » qui, en articulant ce concept à une notion non normative de fonction biologique, résoudrait ces difficultés. L’identification (...) de la santé et de la normalité au sens statistique demeure toutefois centrale dans sa définition. Après avoir précisé le rôle que joue la normalité statistique dans la BST, nous dégageons, à partir de l’épidémiologie contemporaine, un certain nombre de problèmes et questions que cette définition naturaliste soulève.The liability for a naturalist definition of health and for a value-free distinction between the normal and the pathological is at the core of discussions on health and disease in philosophy of medicine. But the statistical concept of normality, a central one for any objective definition of health, raises numerous problems. Christopher Boorse argues for a « biostatistical theory » which aims at solving these difficulties by articulating a statistical concept of normality and a non-normative concept of biological function. However the BST is still based on identifying normality and health with the most frequent. After analyzing in details the true role of statistical normality in BST, I will show how results and data from modern epidemiology can be mobilized to reveal several limits and difficulties with respect to this naturalist definition of health and disease. (shrink)

The article examines the relationship between a trait’s effect on survival and reproduction and the notion of functional efficiency underlying the biostatistical theory of health. BST faces the problem of how to measure a trait’s joint effect on survival and reproduction in its account of function. If one measures the joint effect by means of the biological notion of fitness, examples such as the hereditary breast and ovarian cancer syndrome do not count as a disorder. If one does (...) not invoke biological fitness, it is unclear how to measure the joint effect while keeping to BST’s naturalist credentials. (shrink)