Over diagnosis of PCOS – An article, a rebuttal and a response

||Over diagnosis of PCOS – An article, a rebuttal and a response

Over diagnosis of PCOS – An article, a rebuttal and a response

This CRE is founded on addressing the concerns and improving the quality of life of women with PCOS,  hence the response to the recent British Medical Journal (BMJ) article in which Copp et al contested that PCOS was over diagnosed. The original British Medical Journal article by Copp et al can be found here, the Medical Journal of Australia Insight rebuttal article by Melanie Gibson-Helm, Rob Norman and Helena Teede is below. 

INTRODUCTION

In a recent article in the British Medical Journal (BMJ) it was contested by Copp et al that PCOS was overdiagnosed. Delaying diagnosis and considering treatment without making a diagnosis was promoted. Key arguments related to Rotterdam expansion of phenotypes, higher prevalence and ncertain long-term health outcomes, as well as challenges with diagnosis in adolescents. All of these points are reasonable considerations. However, the article over interpreted prevalence data, failed to consider the patient perspectives and ignored the expansive literature on delayed diagnosis and deeply seated patient dissatisfaction.

THE REBUTTAL

A RECENT commentary by Australian authors, published in the BMJ, which proposed over diagnosis of polycystic ovary syndrome (PCOS), drew on very limited evidence and did not engage affected women. Along with related media attention, the BMJ article arguably adds unnecessary confusion to a field in which researchers, clinicians and patient advocacy groups have worked together internationally to deliver constructive, evidence-based messages aiming to provide clarity for women with PCOS and their health care providers. We have brought together patient advocates, health care providers and academics to counter this largely non-evidence based perspective, drawing on evidence regarding PCOS prevalence, diagnosis, complications and distress. We also outline how improvement in health care and support for women with PCOS will be aided by initiatives to develop the first international evidence-based guideline and comprehensive knowledge translation program for PCOS.

Background

PCOS has long been recognised as the primary cause of oligomenorrhoea, amenorrhoea and anovulatory infertility, and is associated with higher risks of metabolic complications. It is now known that PCOS also has psychological impacts and is associated with pregnancy complications. Examples include a higher prevalence and severity of anxiety and depression symptoms and higher prevalence and earlier age of onset of type 2 diabetes mellitusOverweight and obesity worsen PCOS and lifestyle management is a first-line management strategy for improving reproductive and metabolic features.

The original National Institutes of Health (NIH) PCOS diagnostic consensus required oligoovulation or anovulation and clinical or biochemical hyperandrogenism with exclusion of other aetiologies (Zawadzki J, Dunaif A. Diagnostic criteria for polycystic ovary syndrome: towards a rational approach. In: Dunaif A, Givens J, Haseltine F, Marrian G, editors. Current Issues in Endocrinology and Metabolism: Polycystic Ovary Syndrome Boston, USA: Blackwell Scientific; 1992. p. 377-384). These criteria are consistently recommended in adolescence, where inaccuracy and inappropriateness of vaginal ultrasound is well recognised. However, in adult women, the internationally endorsed diagnostic criteria (including by the NIH) are the Rotterdam criteria, which require two of three characteristics: oligoovulation or anovulation, clinical or biochemical hyperandrogenism and polycystic ovaries on ultrasound, with exclusion of other causes. The Rotterdam criteria give rise to multiple PCOS phenotypes, which in a clinical context reflect a woman’s individual symptoms, experience and potential PCOS complications. The advent of multiple phenotypes has generated controversy, and a greater understanding of the natural history of PCOS phenotypes is a major research priority. It is in the context of broadened diagnostic criteria and multiple phenotypes that Copp and colleagues argued that PCOS is overdiagnosed and recommended a delayed approach to diagnosis. Yet, considerable evidence and patient experience show that under-recognition is the overwhelming challenge, and that women with PCOS want prompt diagnosis and education (see Box below).

PCOS prevalence

Copp and colleagues suggest that the introduction of the Rotterdam criteria has driven a dramatic increase in prevalence from 4–6% to 21%, arguing that this increase provides evidence of overdiagnosis. This selective reporting captures extreme estimates from diverse and uncomparable populations. The estimate of 21% is drawn from a study involving Aboriginal and Torres Strait Islander women. This study reported a very high prevalence (15%) under the original NIH criteria, a marginal increased prevalence with the application of modified Rotterdam criteria, and recognised the primary drivers of prevalence were ethnicity and obesity. Insulin resistance is involved in the aetiology of PCOS and factors that affect insulin resistance, such as ethnicity and increasing prevalence of obesity, will contribute to variability in estimates of PCOS prevalence. Also, rather than overstating the impact of the Rotterdam criteria on prevalence, we cite the recent systematic review in this area, showing a more modest variation in prevalence: 6% (95% confidence interval, 5–8%) from studies applying the NIH criteria and 10% (95% confidence interval, 8–13%) from studies applying the Rotterdam criteria. We contend that variation in reported PCOS prevalence is multifactorial and cannot be used as direct evidence of overdiagnosis.

Diagnosis

On the basis of proposed overdiagnosis, Copp and colleagues recommend “a slower, stepped or delayed approach to diagnosis to optimise benefits and reduce harm from disease labelling”. Yet, there is no direct evidence of overdiagnosis, or of harm from diagnosis. On the contrary, evidence suggests that PCOS is under-recognised and that delays cause harm. Sivayoganathan and colleagues reported that 34% of women who were later confirmed to have PCOS did not receive a diagnosis despite attending infertility, gynaecology, endocrinology or dermatology clinics with PCOS clinical features. In a primary care setting, 50% of probable cases didn’t have a recorded diagnosisMarch and colleagues reportedthat in a community setting, screening showed that 68% of women with PCOS were undiagnosed. While the latter is suggestive of under-recognition of PCOS, it is important to note that this study relied on community-based screening case finding, where symptoms may be minimal. Consistent with these findings, current guidelines do not recommend community-based screening for PCOS. More compelling are the clinic-based studies, such as Sivayoganathan and colleagues, where women present with PCOS symptoms to services that commonly manage PCOS and, yet, a considerable proportion do not receive a diagnosis. It is also important to acknowledge that PCOS diagnostic features represent a continuum, just as they do in diabetes or hypertension and establishing ideal cut-offs for each feature is challenging. Furthermore, inconsistent application of the diagnostic criteria may drive misdiagnosis, and may be more likely to occur in women with polycystic ovarian morphology on ultrasound, but no other features of PCOS. These issues will not be addressed by claiming overdiagnosis and recommending delayed diagnosis, but rather by research, consistent practice based on evidence-based guidance and education.

It was also suggested that women with non-hyperandrogenic PCOS phenotypes may experience unnecessary distress if diagnosed, potentially leading to inaccurate perceptions of risk of long term metabolic complications. While research to further characterise the natural history of PCOS and long-term health outcomes is essential across phenotypes, it is notable that insulin resistance is present in the overwhelming majority of both lean and overweight young women with PCOS, with current evidence suggesting little impact of different diagnostic criteriaA recent review, which incorporated systematic review evidence, concluded that PCOS status confers cardiometabolic and diabetes risk, and differences across phenotypes are largely obesity related. Current guidelines therefore recommend PCOS diagnosis across all phenotypes and cardiometabolic screening for all women with PCOS, and until evidence shows risk divergence by phenotype, these guidelines should direct diagnosis and risk assessment.

Distress

Cautious diagnosis is the current internationally recommended approach for adolescents, for whom a PCOS diagnosis is not recommended within 2 years of menarche and diagnostic ultrasound is not advised. Diagnosis in adolescence requires both oligoovulation and hyperandrogenism, with follow-up to confirm persistence of clinical features longer term. However, suggesting a delayed approach to diagnosis for all women is inappropriate. There is no evidence that women with PCOS would prefer a delayed diagnosis, but there is compelling, clear and consistent evidence from affected women around the world showing unacceptable delays in diagnosis with adverse impact.

Women currently report seeing multiple health care providers about their PCOS symptoms before receiving a diagnosis. Women have to raise their concerns on multiple occasions (here and here) and experience frustrating delays prior to diagnosis (herehere and here). Delayed diagnosis is associated with anxiety and depression symptoms. In a longitudinal, community study of over 11 000 women, those with PCOS reported more psychological distress than those without PCOS. This distress was equally high in the year before the diagnosis as afterwards, suggesting that distress was related to PCOS features rather than the diagnosis label. Establishing a diagnosis is important to women and many report feeling relief at this time. However, receiving a diagnosis can also lead to anxiety or lack of control in the absence of appropriate support and informationWomen’s initial source of information is their health care provider, who can provide personally relevant information, enabling better management of the condition. To propose delaying diagnosis based on unfounded arguments of distress with diagnosis and on whether long term metabolic features of PCOS may be limited in some phenotypes disregards the clearly reported experiences of poor diagnosis experienced by women with PCOS.

Stephen Hawking recently noted, in relation to health, that: “For a scientist, cherry-picking evidence is unacceptable. When public figures abuse scientific argument, citing some studies but suppressing others to justify policies they want to implement for other reasons, it debases scientific culture. One consequence of this sort of behaviour is that it leads ordinary people to not trust science at a time when scientific research and progress are more important than ever”.

We would likewise contest that for academics to selectively present evidence to propose a contention that disregards compelling evidence on patient experience is unacceptable. Also, to suggest simply treating symptoms without providing women with a diagnosis, or opportunity for education and consideration of often neglected features of PCOS, is challenging in the current era of shared decision making and health care as a partnership between health care providers and patients.

Moving forward

The time has come for consistent, evidence-based approaches to PCOS, developed in partnership with women and health care providers. A better understanding of PCOS features in adolescents and of the long term health outcomes across the PCOS phenotypes is essential. However, in the absence of evidence of overdiagnosis, or of adverse impact of diagnosis, and in the presence of evidence of under-recognition and unacceptable and distressing delays in diagnosis, we contend that suggestions to delay PCOS diagnosis in adult women and treat without a diagnosis are inappropriate and serve only to increase confusion.

In partnership with women with PCOS, we are leading a unique international PCOS initiative seeking to address challenges in diagnosis and inconsistency in care. Built on international engagement of thousands of health care providers and women, the first international evidence-based guideline for PCOS will be launched in mid-2018 and will be accompanied by an extensive implementation and translation program. This initiative is led by the National Health and Medical Research Council funded Australian Centre for Research Excellence in PCOS, in partnership with the European Society of Human Reproduction and Embryology and the American Society for Reproductive Medicine, with 31 other societies and patient advocacy groups internationally.

The initiative will be evaluated for impact on measures of direct importance to women and health care providers. Research priorities will emerge, including around the diagnostic criteria, along with a case for action for greater research investment in this previously neglected condition. We contest that this is a more constructive and appropriate approach that acknowledges the current distress and suboptimal experience widely reported by women with PCOS and aims to improve diagnosis, experiences, health care and outcomes for women with PCOS.

Dr Melanie Gibson-Helm is an NHMRC research fellow at the Monash Centre for Health Research and Implementation.

Professor Robert Norman is Professor Reproductive – Periconceptual Medicine at the Robinson Research institute at the University of Adelaide.

Professor Helena Teede is an endocrinologist, Professor of Women’s Health, and Director of the Monash Centre for Health Research and Implementation, and an NHMRC Practitioner Fellow. All correspondence to helena.teede@monash.edu

http://www.pcoschallenge.org.

Let’s recap:

The original article from Copp et al.

The rebuttal from Helena, Rob and Melanie.

Original author’s response to the rebuttal.

Helena’s ABC Radio National interview is here.

References from this article are here.

 

 

 

2017-12-13T12:51:35+00:00