Regulatory agencies in UK and US have yet to address dangers inherent in customer misunderstanding of DTC medical laboratory genetic test results
Direct-to-consumer (DTC) medical laboratory genetic tests are gaining popularity across the globe. But recent research out of the United Kingdom questions the reliability of these tests. The study, according to The Guardian, found that “Over the counter genetic tests in the UK that assess the risk of cancer or heart problems fail to identify 89% of those in danger of getting killer diseases.”
According the PGS website, “each PGS in the catalog is consistently annotated with relevant metadata; including scoring files (variants, effect alleles/weights), annotations of how the PGS was developed and applied, and evaluations of their predictive performance.”
However, the researchers told The Guardian, “Polygenic risk scores performed poorly in population screening, individual risk prediction, and population risk stratification. Strong claims about the effect of polygenic risk scores on healthcare seem to be disproportionate to their performance.”
“Strong claims have been made about the potential of polygenic risk scores in medicine, but our study shows that this is not justified,” Aroon Hingorani, PhD (above), Professor of Genetic Epidemiology at UCL and lead author of the study, told The Guardian. “We found that, when held to the same standards as employed for other tests in medicine, polygenic risk scores performed poorly for prediction and screening across a range of common diseases.” Consumer misunderstanding of DTC medical laboratory genetic tests is a real danger. (Photo copyright: University College London.)
Polygenic Scores Not Beneficial to Cancer Screening
To complete their study, the UCL researchers compared PGS genetic risk data to conventional clinical laboratory testing methods and discovered some troubling results. They include:
On average, only 11% of individuals who developed a disease had been identified by the tests.
A 5% false positive rate where people were informed that they would get a disease within 10 years but did not.
PGS only identified 10% of people who later developed breast cancer.
The researchers state in their BMJ Medicine paper that polygenic risk scores are not the same as testing for certain gene mutations, which could be critical in screening for some cancers. They also wrote that discovering genetic variants associated with the risk for disease is still crucial for drug development.
“It has been suggested that polygenic risk scores could be introduced early on to help prevent breast cancer and heart disease but, in the examples we looked at, we found that the scores contributed little, if any, health benefit while adding cost and complexity,” research physician and epidemiologist Sir Nicholas Wald, FRS, FRCP, FMedSci, Professor of Preventive Medicine at UCL Institute of Health Informatics and co-author of the study, told the Jersey Evening Post.
“Our results build on evidence that indicates that polygenic risk scores do not have a role in public health screening programs,” Wald added.
“This research study rightly highlights that for many health conditions genetic risk scores alone may have limited usefulness, because other factors such as deprivation, lifestyles, and environment are also important,” clinical epidemiologist Raghib Ali, MD, CEO, Chief Investigator and Chief Medical Officer, Our Future Health UK, told The Guardian.
Our Future Health is a collaboration between public, non-profit, and private sectors to create the UK’s largest health research program. The researchers in this endeavor intend to recruit over five million volunteers and use polygenic risk scores to develop innovative ways to prevent, detect, and treat disease. This program is funded by the UK’s National Health System (NHS).
“[Our] research program will be developing integrated risk scores that will take in all the important risk factors,” Ali explained. “We hope these integrated risk scores can identify people more likely to develop diseases, but this is a relatively new area of science and there are still unanswered questions around it.”
Danger of Misunderstanding DTC Genetic Tests
Here in the US, there have been news stories in recent years about the unreliability of certain genetic tests. Dark Daily covered these stories in previous ebriefs. News stories about the unreliability of genetic tests, particularly those marketed directly to consumers, reveal the problems that existing regulatory schemes have yet to address.
In “Consumer Reports Identifies ‘Potential Pitfalls’ of Direct-to-Consumer Genetic Tests,” we covered CR’s findings that though clinical laboratory and pathology professionals understand the difference between a doctor-ordered genetic health risk (GHR) test and a direct-to-consumer (DTC) genetic test, the typical genetic test customer may not. And that, misunderstanding the results of a DTC at-home genetic test can lead to confusion, loss of privacy, and potential harm.
Scientific American also covered the dangers of DTC testing in “The Problem with Direct-to-Consumer Genetic Tests,” in which the author notes that “despite caveats in ads and on packages, users can fail to understand their limitations,” and that “consumer-grade products are easily misconstrued as appropriate medical tests and create false reassurances in patients who could be at legitimate risk.”
Most clinical laboratory managers and pathologists are probably not surprised that the research performed at UCL shows that there are still issues surrounding genetic tests, particularly those marketed directly to consumers. While direct-to-consumer DNA tests can have some benefits, at this time, they are not always the best option for individuals seeking information about their personal risk for hereditary diseases.
More than 10,000 doctors walked out for the second time in two months, further burdening an already overwhelmed NHS
On April 11, tens of thousands of junior doctors (similar to medical residents in the US) left their posts in British hospitals commencing a four-day walkout. The strike resulted in the cancellation of thousands of operations and appointments, as well as cancelling or delaying thousands of clinical laboratory tests and anatomic pathology readings associated with those healthcare visits and surgical procedures.
The walkout was spurred by pay concerns and working conditions and comes on the heels of a three-day strike last month. That strike had already weakened the UK’s frail National Health System (NHS), which has become inundated with appointment backlogs that predate the COVID-19 pandemic, and which has led to longer wait times to see a doctor, ABC News reported.
This latest strike was more perilous since the senior doctors who covered for their juniors during last month’s strike were previously on leave for a holiday weekend, United Press International (UPI) reported.
“These strikes are going to have a catastrophic impact on the capacity of the NHS to recover,” Matthew Taylor (above), Chief Executive of the NHS Confederation, told Sky News. “The health service has to meet high levels of demand at the same time as making inroads into that huge backlog … That’s a tough thing to do at the best of times—it’s impossible to do when strikes are continuing.” (Photo copyright: Wikimedia Commons.)
Junior Docs Cite Injustice
Junior doctors who walked out are calling for a 35% pay raise to right the wrongs of 15 years of below-inflation raises, but the government continues to argue it cannot afford to increase pay, UPI noted.
“There is nothing ‘junior’ about the work I have done as a doctor. For an hour of work that I might save a life, I can be paid 19£ [$23.65],” said Jennifer Barclay, MD, a surgical junior doctor in the UK’s North West electoral zone, in a British Medical Association (BMA) press release.
“My dad, an electrician, tells me to quit and retrain in his footsteps. I’d be earning more, have less stress, less responsibility, better hours, and a better work-life balance after three years,” she added. “Surely, this life, this training, responsibility, debt, and crushing workload is worth more than 19£ per hour? I’ll be on the picket line this week because doctors believe that it is.”
According to the BMA, newly qualified junior doctors earn just over 14£ ($17.43) per hour, ABC News reported, which added, “The doctors’ union has asked for a 35% pay rise to bring junior doctor pay back to 2008 levels.”
However, their pay demands come in the midst of a cost-of-living crisis in the UK. Inflation has risen above 10%. Paired with increases in heating costs and food prices mean that decreased wages leave many struggling to pay bills, ABC news reports.
A hard-hitting BMA advertising campaign designed to shine light on these disparities depicts three junior doctors (with one-, seven-, and 10-years’ experience) removing an appendix. The video shows that the total the three would be paid for the hour-long operation would be 66.55£ ($82.84):
Doctor with one year experience: 14.09£ ($17.54).
Doctor with two years’ experience: 24.46£ ($30.45).
Doctor with three years’ experience: 28£ ($34.85).
And this for performing a potentially life-saving procedure, the BMA stated.
In the press release, BMA Junior Doctors Committee co-chairs Robert Laurenson and Vivek Trivedi said, “It is appalling that this government feels that paying three junior doctors as little as 66.55£ between them for work of this value is justified. This is highly skilled work requiring years of study and intensive training in a high-pressure environment where the job can be a matter of life or death.”
Patient Care is Affected
Lower salaries also affect patient care levels and have led to recruitment issues, with many doctors leaving the profession, the BBC reported. “This is not a situation where we are fixed in our position. We’re looking for negotiations and Steve Barclay (UK’s Secretary of State for Health and Social Care) isn’t even willing to talk to us. He hasn’t put any offer at all on the table … there has to be two sides in the discussion,” Emma Runswick, MD, a junior doctor and deputy chairwoman of the BMA, told the BBC.
But while the junior doctors battle for wages, the government’s initial focus has been on patient wellbeing. “There will be risks to patient safety, risks to patient dignity, as we are not able to provide the kind of care we want to,” NHS Confederation Chief Executive Matthew Taylor told UPI prior to the walkout.
The timing of the walkout also caused consternation with the NHS. “Not only will walkouts risk patient safety, but they have been timed to maximize disruption after the Easter break,” Health Secretary Barclay told UPI as the walkout was announced.
Barclay also claimed the amount sought by doctors was “unreasonable” and would cause raises above $25,000 per year, UPI reported. “If the BMA is willing to move significantly from this position and cancel strikes, we can resume confidential talks and find a way forward as we have done with other unions,” he stated.
It is important to note that doctors would be pulled from picket lines if immediate danger were present due to trade union laws that say life-and-limb coverage must be provided, the BMA told the BBC.
15th Annual Frontiers in Laboratory Medicine (FiLM) takes place in Birmingham, England, on January 31–February 1, 2017, and features pathology experts from UK, France, Sweden, The Netherlands, Serbia, Canada, and the USA
Recent innovations in medical laboratory management and operations in Europe and the United Kingdom (UK) will be the subject of a major conference that takes place on January 31 through February 1, 2017, in Birmingham, England. It is the 15th annual Frontiers in Laboratory Medicine (FiLM).
“Medical laboratories throughout Europe are confronted with multiple challenges,” stated Robert Michel, Editor-in-Chief of The Dark Report and one of the conference organizers. “Funding for lab tests is shrinking, demand for lab tests is soaring, and many national health systems are taking forceful actions to consolidate labs into regional networks. All of these topics will be discussed at FiLM.” (more…)
