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Page 1: Confidentiality, disclosure and doping in sports medicine

Original article

Br J Sports Med 2011;45:174–177. doi:10.1136/bjsm.2009.064253174

1Department of Philosophy, History and Law, School of Health Science, Swansea University, Swansea SA2 8PP, UK 2Director Postgraduate Healthcare Studies, Cardiff University, Ty Dewi Sant, Heath Park, Cardiff CF14 4XN, UK

Correspondence to Professor Mike McNamee, Department of Philosophy, History and Law, School of Health Science, Swansea University, Swansea SA2 8PP, UK; [email protected]

Accepted 3 October 2009Published Online First 15 October 2009

Confi dentiality, disclosure and doping in sports medicineM McNamee,1 N Phillips2

ABSTRACTThe manner in which healthcare and medical

professionals serve their athlete patients is governed

by a variety of relevant codes of conduct. A range of

codifi ed rules is presented that refer both the welfare of

the patient and the maintaining of confi dentiality, which

is at the heart of trustworthy relations. The 2009 version

of the World Anti-Doping Code (WADC), however,

appears to oblige all healthcare professionals not to

assist athletes if they are known to be engaged in doping

behaviours under fear of removal from working with

athletes from the respective sports. In contrast, serving

the best interests of their athlete patients may oblige

healthcare professionals to give advice and guidance,

not least in terms of harm minimisation. In so far as

the professional conduct of a healthcare professional

is guided both by professional code and World Anti-

Doping Code, they are obliged to fall foul of one or the

other. We call for urgent and pressing inter-professional

dialogue with the World Anti-Doping Agency to clarify

this situation.

It should come as no surprise that healthcare pro-fessionals have been engaged in unethical conduct in sports1 and notably with respect to doping. This is true in such famous events as the Tour De France2 and in less elite3 and sometimes adoles-cent cases.4 Although no one suspects that these interventions are the norm, the pressures in elite sports and the money that is often at stake render it likely that the temptation to medically assist doping will always remain. The work of every healthcare professional is guided by ethical con-siderations over which their relevant professional body has legitimate governance. Doping has itself been the object of discussion over a number of years within sports-related healthcare professions, such as the British Association of Sport and Exercise Medicine, the International Federation of Sports Medicine (FIMS), the Association of Chartered Physiotherapists in Sports Medicine and the International Federation of Sports Physiotherapy (IFSP). Most have publicly declared the unaccept-ability of doping in position statements. Advice regarding what professionals may and may not do with respect to doping forms a part of their clini-cal professional guidance. The sources of guid-ance vary for the healthcare professional working in sports medicine from their profession to the World Anti-Doping Agency (WADA). In what fol-lows, we examine a potential confl ict in the duties of a healthcare professional who cannot simulta-neously serve the patient’s best interests while disengaging from giving advice regarding doping behaviours. In such a dilemma, the healthcare

professional may either fi nd that they are culpable of a doping offence or, in disclosing the confi den-tial information of such, be “struck off” from their respective profession.

ETHICAL AND PROFESSIONAL GUIDANCE: THE DUTIES OF A HEALTHCARE PROFESSIONALIn the UK, signifi cant statutory bodies are the General Medical Council (GMC) and the Health Professions Council (HPC). The overarching pro-fessional bodies concerned are the British Medical Association (BMA) and the Chartered Society of Physiotherapy (CSP), whereas for those execut-ing their job with athletic populations, a further variety of more specifi c professional groups are involved—for example, FIMS, British Association of Sport and Exercise Medicine, Association of Chartered Physiotherapists in Sports Medicine, IFSP, International Olympic Committee Sports Medicine Code.5 Although there are nuanced dif-ferences among them in relation to various aspects of professional performance, there are also easily discerned shared commitments. Among them, the following are of particular signifi cance: (1) human dignity; (2) protection of health and safety; (3) confi dentiality and privacy; (4) informed consent; and (5) duty of care.

Thus, according to the HPC (2008)6—for exam-ple, the duties of a registrant demand that:

You must act in the best interests of service 1. users.You must respect the confi dentiality of ser-2. vice users.You must behave with honesty and integ-3. rity and make sure that▶ your behaviour does not damage the pub-

lic’s confi dence in you or▶ your profession.

(http://www.hpc-uk.org/assets/documents/10002367FINALcopyofSCPEJuly2008.pdf)6

In a similar vein, the GMC7 advises its members to:

▶ Make the care of your patient your fi rst concern;

▶ Protect and promote the health of patients and the public;

▶ And later in the list;▶ Respect patients’ right to confi dentiality.

(http://www.gmc-uk.org/guidance/good_medi-cal_practice/duties_of_a_doctor.asp)7

Given the broad duties that govern ethical conduct in healthcare and medicine, what specifi c duties arise in the contexts of sports medicine with spe-cifi c respect to antidoping related expectations?

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Br J Sports Med 2011;45:174–177. doi:10.1136/bjsm.2009.064253 175

We shall consider one aspect of the new World Anti-Doping Code (WADC).

THE 2009 WADC8The new WADC,8 which is the second version, has been accepted by >100 member states of the UNESCO. Its scope is greater than that possessed by the previous two. Although the processes of its development incorporated widespread consultation, certain aspects of its regulatory framework have brought considerable opposition. Notably, the International Football Federation (FIFA) has rejected its whereabouts clause, where athletes are required to post, 1 month in advance, their whereabouts for 1 h each day in order to facilitate random, out-of-competition testing. Equally, the European Union has publicly articulated its unease with what appears to be a dis-proportionate invasion of privacy.

One aspect of the WADC not commented upon is the tight-ening of regulations relating to the medical support team. The rationale for this tightening is well founded. Clearly, where doping was widespread in some sports, it was not the effect of isolated individuals trying to gain illicit advantage. Rather, access, prescription, dosage and removal of doping products/processes were the object of systematic organisation and con-trol by the sports support system that included doctors, physio-therapists, sports massage therapists and coaches/managers.

Clearly, then, in attempting both to deter and, where neces-sary, punish members of the support system, greater attention was required to call to account the full range of individuals contributing to the doping offence. The section of the code stipulating antidoping violations was therefore modifi ed to include the following article, relating specifi cally to adminis-tration of banned substances by a third party. Thus, Article 2.8 of the WADC8 states that a doping offence may be deemed to have occurred if a healthcare professional acts so as to satisfy any or all of the following conditions:

Administration or Attempted administration to any Athlete In-Competition of any Prohibited Method or Prohibited Substance, or administration or Attempted administra-tion to any Athlete Out-of-Competition of any Prohibited Method or any Prohibited Substance that is prohibited Out-of-Competition, or assisting, encouraging, aiding, abetting, cov-ering up or any other type of complicity involving an anti-doping rule violation or any Attempted anti-doping rule violation.(emphasis added)( h t t p : // w w w.wad a - a m a .or g /r t ec on t e n t /do c u me n t /code_v2009_En.pdf)8

The offence carries with it certain prohibitions that should be put into effect by the relevant sports bodies themselves. WADA has no jurisdiction to punish sports medicine professionals. Two issues arise here. They both relate to the jurisdiction of governance. First, there will be variability as to how any par-ticular professional body will implement the sanction to prac-titioners in breach of WADC. Other countries will also vary in their interpretation and application of the rule(s). International harmonisation of responses here is unlikely to be achieved, although one might ask whether global bodies such as FIMS or IFSP, or indeed the World Medical Association or the World Congress of Physical Therapy ought to take a policy lead for the sake of consistency. Only bodies who are signatories to the WADC are likely to implement its sanctions. Second, WADA recommends, although it has no power to do more than this, that the offending individual be banned from working with athletes within that body. (It is not, however, possible to ban

them from all sports-related assistance. The scope of the ban refers predominantly to the sports governing body in which the offence emerged, though it extends to all signatories.)

At fi rst sight, this appears to be precisely the kind of regula-tion required to capture fully the offending parties in the sports medicine community. On closer inspection, however, the list of verbs that enunciate the sanctionable offence may give rise to considerable professional and ethical concern. It is worth cit-ing the list of verbs: “assisting, encouraging, aiding, abetting, covering up or any other type of complicity involving an anti-doping rule violation”. Each of these verbs can be used to cap-ture wrongful conduct for which a sanction may be applied.

Take one example from the list to serve as an illustration of the problem faced by the healthcare practitioner: What pre-cisely is “aiding and abetting” to be taken to mean? There is no particular legal or medical meaning of these terms. Courts, no less than healthcare professionals, must use the everyday meanings of these words, which are open to considerable ambiguity and interpretation. A number of everyday scenarios might reasonably be envisaged, therefore, that would render the healthcare professional vulnerable to a charge of “aiding and abetting” a doping offender. For the purposes of illustra-tion, we shall now discuss one such diffi culty in terms of con-fl icts of duties in a realistic hypothetical scenario.

Perhaps the most widely shared healthcare or medical norm is that of serving the patient’s best interests while, ceteris pari-bus, respecting their autonomous decision- making as to the nature and means of any professional intervention. Thus, our healthcare professional, in line with the recent urgings of medi-cal ethicists and sports medics,9–12 is deeply concerned with the health of the athlete in their care (understood as their patient). Therefore, in line with general medical norms of respect for autonomy and acting in their best interest, they would consider it important that the athlete comprehends any information and advice imparted. Now imagine further that a patient informs the healthcare professional that they have—for example, been using off-label performance-enhancing products using the information on the web to determine their own dosages and cycles. Then they approach the healthcare professional, con-cerned with what they perceive to be a moderately serious condition. Let us imagine that our hypothetical healthcare professional is committed to doping-free sport. Nevertheless, healthcare professionals also feel compelled to make their patient aware of the potential consequences of inter alia con-tinued use, lowering doses, arranging cycles in the least harm-ful way and doing their best to persuade the athlete to cease their doping practices. All to no avail, the apparently well-in-formed patient argues that it is their body and no one else’s that is at risk, and that they deem continued doping a risk worth taking. To cap it all, they state in no uncertain terms, that the professional may, under no circumstances, inform third parties regarding the consultation. They threaten legal action if this route is taken by the healthcare professional.

Now, let us return to our wide-ranging WADC verbs and their potential collision with generally applicable professional norms, as cited above. Every healthcare professional is charged with serving the best interests of their patient. Part of this will entail respecting patient autonomy by imparting the relevant information and advice. Our hypothetical colleague appears to have met this obligation by informing the patient of dangers and recommending the cessation of doping. However, there is an obvious diffi culty in what to do with this information, or “guilty knowledge”.13 Are the best interests of the patient served by releasing this information into the public domain?

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The client has forbidden this possibility and the healthcare professional is properly aware of their duty to respect the patient’s autonomous decision-making. It is at this point, mindful of their differing frameworks for professional gover-nance, that the relevant codes are consulted. For the purposes of argument, let us do the same and pay particular attention to the matter of patient confi dentiality.

PATIENT CONFIDENTIALITYA variety of ethical questions may have arisen in the mind of the committed antidoping healthcare professional. Should they deliberately overestimate risks in their communication to their patient? With whom, if anyone, should they share the information? Should they write up the notes in full or fail to document incriminating data? Should they leave such notes, full or otherwise, in the purview of others who might discover them? They conclude that the duties of care and of confi denti-ality appear to have priority.

The sources of the duty of care, of which confi dentiality is a key part, are threefold. They may arise individually or jointly from contract, law or professional codes.14–16 We focus here on the latter. Recall that the second duty of a healthcare profes-sional as stated by the HPC is to the confi dentiality of patient data. Later, the HPC standards policy6 elaborates this duty:

You must treat information about service users as confi den-tial and use it only for the purposes they have provided it for. You must not knowingly release any personal or confi dential information to anyone who is not entitled to it, and you should check that people who ask for information are entitled to it.You must only use information about a service user:

▶ to continue to care for that person; or▶ for purposes where that person has given you specifi c per-

mission to use the information.HPC standards (http://www.hpc-uk.org/assets/documents/10002367FINALcopyofSCPEJuly2008.pdf)6

It would appear then that our colleagues’ hands are tied. Disclosure would be against the expressed wishes of the ath-lete patient and this would contravene their duty of care. Let us consider then what specifi c professional bodies have to say on the general matter.

Similar advice is provided by the CSP in their rules of profes-sional conduct:

Information given by the patient is to be held in the strictest of confi dencePhysiotherapy information is only released to sources, other than those immediately involved in the patient’s care, when there is a signed patient consent form to allow this process.(CSP core Standards of Practice 2005; http://www.csp.org.uk/uploads/documents/csp_core_standards_2005.pdf)17

With respect to patient confi dentiality the GMC (2004)18 sim-ilarly holds that:

Patients have a right to expect that information about them will be held in confi dence by their doctors. Confi dentiality is cen-tral to trust between doctors and patients. Without assurances about confi dentiality, patients may be reluctant to give doctors the information they need in order to provide good care. If you are asked to provide information about patients you must:

▶ inform patients about the disclosure, or check that they have already received information about it;

▶ anonymise data where unidentifi able data will serve the purpose;

▶ be satisfi ed that patients know about disclosures neces-sary to provide their care, or for local clinical audit of that care, that they can object to these disclosures but have not done so;

▶ seek patients’ express consent to disclosure of information, where identifi able data are needed for any purpose other than the provision of care or for clinical audit—save in the exceptional circumstances described in this booklet;

▶ keep disclosures to the minimum necessary; and▶ keep up to date with and observe the requirements of stat-

ute and common law, including data protection legislation.(http://www.gmc-uk.org/guidance/current/library/confi denti-ality.asp#Principles)18

None of this seems to help the physician in our scenario, bur-dened by the weight of guilty knowledge. One can hardly expect the patient to support disclosure, however, much our earnest healthcare professional encourages them to do so. Conversely, the anonymised leakage of the information is hardly going to satisfy antidoping authorities given the strictures of WADC.

Although the BMA guidance recognises the general norms for maintaining confi dentiality as a foundation of trustworthy relations, it notes that:

Patients should be able to expect that information about their health, which they give in confi dence, will be kept confi den-tial unless there is a compelling reason why it should not. There is also a strong public interest in maintaining confi den-tiality so that individuals will be encouraged to seek appro-priate treatment and share information relevant to it. (BMA confi dentiality toolkit) (http://www.bma.org.uk/images/Confi dentiality_Toolkit_2008_tcm41-156761.pdf)19

Therefore, in the prosecution of this advice, everything is going to hang on whether there is a “compelling reason” to dis-close the doping athlete patient. Yet it is far from clear what might constitute this. On the one hand, it might be said that preventing a star athlete from gaining gold, thus depriving other athletes (presumably clean) of their right to a fair contest, was compelling. However, the contrary position could also be argued. Thus, it might be argued that the dishonour brought upon relevant others by a potential doping scandal was compel-ling, although again a counterargument is also fairly obvious.

DISCLOSURE: UNDER WHAT CONDITIONS IS IT JUSTIFIABLE?Writing a professional code of conduct is not a task for the feint-hearted because it requires the author(s) to envisage the unlimited variety of contexts that may standardly apply in the patient–professional encounter. Thus, rules for disclo-sure against the general prohibition have been made. It is a widely accepted norm that information may be shared within a healthcare team to provide treatment that is in the best inter-est of the patient.20 However, the information shared should proceed on the authorisation of the patient, in line with their conception of best interests. Also, our scenario clearly does not satisfy disclosure under these terms. The GMC (2004)18 offers the following considerations. Against the general norm for confi dentiality, disclosure may be justifi ed:

▶ where to withhold it would be to put others at “risk of death or serious harm”;

▶ that those who receive disclosure—subject to the above condition—are bound by confi dentiality to; and

▶ that it may be justifi ed in a medical emergency.(http://www.gmc-uk.org/guidance/current/library/confi denti-ality.asp#Principles)18

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Our example case appears not to fulfi l these defeasible condi-tions. Although there might be cases of death or serious harm to the patient, it is not clear that others will be suffi ciently harmed that disclosure is warranted. Second, to disclose the data to other regulatory antidoping bodies would be contrary to the rule because they would act upon it publicly against the patient. Third, it would be stretching credulity to think of the case as a medical emergency. It is clear that there would be room for argument if the particularities of each case were to alter.

Is the CSP Standards of Professional Performance any more helpful? In the fi rst instance, it is problematic to assume that physiotherapists are even aware of such standards, given the non-standardised teaching of the issue.21 It argues that:

“Where confi dentiality cannot be guaranteed, the patient should be informed of this fact and given the option to decline giving information.” Then further advises its members: “In disclosing information, the physiotherapist needs to consider their duty of care to the patient and their obligation to work within the scope of physiotherapy practice. Disclosure of information without con-sent and which breaches confi dentiality must only occur within specifi c legal situations e.g. child protection or public interest.”(ht tp://www.csp.org.uk /uploads/documents/csp_core_standards_2005.pdf)17

Now this particular context that the CSP notes might make disclosure ethically acceptable cannot apply because our would-be physiotherapist has been made aware of the doping without the opportunity to prevent the athletic patient spilling the beans, so to speak. There also exists little hope of a form of conscientious objection to offer advice being justifi ed along-side the norm to serve the patient’s best interests. Let us con-sider the criteria that might be applied to the case. The WADC has legal analogues in certain European countries (eg, France, Italy, Slovenia) where those engaged in doping may be liable to criminal prosecution. However, there are no such laws in the UK despite recent urgings by the International Olympic Committee. It appears that only the athlete is being harmed, so the potential justifi cation of disclosure to protect others from harm cannot reasonably be invoked. Might it be in the public interest? This route therefore appears equally problematic.

THE RUBDespite the fact that the language for both the HPC standards and the advice by the GMC is much simpler and much more general than the CSP or BMA, each of them is fairly clear about where we stand regarding sharing confi dential information with a third party if permission has been withheld. Our hypo-thetical scenario seems to fall below the standards required for the justifi ed disclosure of the doping. Moreover, all profes-sional codes exhort their members to serve the best interests of their patients. Passively allowing the off-label use and self “medication” do not appear consistent with this most general of a healthcare professional. Therefore, our would-be colleague appears duty bound to advise the patient on harm minimisa-tion strategies. This very knowledge, however, allows the dop-ing athlete a more successful strategy. Consequently, this can easily be seen as “aiding and abetting” them because the verbs are themselves so open-ended. Thus, in serving the patient’s best interests, our colleagues become open to a charge of dop-ing offence if the knowledge of the encounter becomes pub-lic, or of being “struck off” if they disclose the information against the express wishes of the patient. (Notwithstanding our remarks about the failure to provide a compelling justifi ca-tion for disclosure.)

CONCLUDING REMARKSWe have argued that there is a tension with regards to a vari-ety of professional codes and the new WADC. Insofar as healthcare professionals must serve the best interests of their patients, they must inter alia give advice and information as to the health choices of the doping athlete as well as respect-ing the privacy of the clinical encounter where doping choices may be revealed. Although it may be diffi cult to harmonise codes that cater for a variety of professional labour, dialogue between WADA, (inter)national sports governing bodies and relevant (inter)national healthcare professions is urgently needed to protect healthcare professionals who are committed both to their clients, their own and their employers’ require-ments for doping-free sport. Clearly, more precise guidelines on how such confl icts will be interpreted by both WADA and the relevant bodies should be made public to prevent profes-sional dilemmas such as this from occurring.

Acknowledgements The authors are grateful to the scholastic legal advice given Richard Griffi th and Lauri Tarasti, and to Rob Dawson in relation to the problems raised by harm-minimisation strategies in relation to doctors working with drug users.

Competing interests MM has been an educational consultant for WADA. NP was Head of Team GB Physiotherapists at 2008 Beijing Olympics.

Provenance and peer review Not commissioned; externally peer reviewed.

Patient consent Not obtained.

REFERENCES 1. Holm S, McNamee M. Ethics in sports medicine. BMJ 2009;339:b3898.

2. Møller V. The ethics of doping and anti doping. London, UK: Routledge 2009.

3. Donati, A. The Silent Drama and Diffusion of Doping among Amateurs and

Professionals. In: Hoberman J, Møller V, eds. Doping and Public Policy. Odense,

Denmark: University Press of Southern Denmark, 2004:45–90.

4. Laure P, Binsinger C, Lecerf T. General practitioners and doping in sport:

attitudes and experience. Br J Sports Med 2003;37:335–8.

5. IOC Sports Medicine Code. http://multimedia.olympic.org/pdf/en _

report _ 1022.pdf (accessed 29 May 2009).

6. Health Professions Council standards. http://www.hpc-uk.org/assets/documents

/10002367FINALcopyofSCPEJuly2008.pdf (accessed 29 May 2009).

7. General Medical Council standards. http://www.gmc-uk.org/guidance/good _

medical _ practice/duties _ of _ a _ doctor.asp (accessed 29 May 2009).

8. World Anti-Doping Code 2009. http://www.wada-ama.org/rtecontent/document/

code _ v2009 _ En.pdf (accessed 21 May 2009).

9. Savulescu J, Foddy B. Good sport, bad sport: why we should legalise drugs in

the Olympics. In: The best Australian sportswriting. Melbourne: Black Inc., 2005.

10. Foddy B, Savulescu J. Ethics of performance enhancement in sport: drugs

and gene doping. In: Ashcroft RE, Dawson A, Draper H, et al., eds. Principles of

healthcare ethics, 2nd edn. London: Wiley, 2007:511–20.

11. Kayser B, Smith AC. Globalisation of anti-doping: the reverse side of the medal.

BMJ 2008;337:a584.

12. McNamee MJ. Doctors’ duties and doping dilemmas In: Moller V, McNamee

MJ, Dimeo P, eds. Elite sport, doping and public health. Odense: University of

Southern Denmark Press, 2009:179–90.

13. McNamee MJ. The guilt of whistleblowing. J Philos Educ 2001;35:423–41.

14. Anderson LC, Gerrard DF. Ethical issues concerning New Zealand sports doctors.

J Med Ethics 2005;31:88–92.

15. Anderson L. Contractual obligations and the sharing of confi dential health

information in sport. J Med Ethics 2008;34:e6.

16. Waddington I, Roderick M. Management of medical confi dentiality in English

professional football clubs: some ethical problems and issues. Br J Sports Med

2002;36:118–23.

17. Chartered Society of Physiotherapists (2005). Core standards of physiotherapy

practice. http://www.csp.org.uk/uploads/documents/csp _ core _

standards _ 2005.pdf (accessed 22 May 2009).

18. General Medical Council (2004). Confi dentiality: protecting and providing

information. http://www.gmc-uk.org/guidance/current/library/confi dentiality.

asp#Principles (accessed 29 June 2009).

19. British Medical Association Confi dentiality Toolkit. http://www.bma.org.uk/images/

Confi dentiality _ Toolkit _ 2008 _ tcm41-156761.pdf (accessed 22 May 2009).

20. Rhodes R. The professional responsibilities of medicine. In: Rhodes R, Francis L,

Silvers A, eds. The Blackwell guide to medical ethics. Oxford: Blackwell, 2007:71–87.

21. Cross S, Sim J. Confi dentiality within physiotherapy: perceptions and attitudes of

clinical practitioners. J Med Ethics 2002;26:447–53.

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