Advocating for assisted suicide on the likelihood of a patient dying within six months has been robustly challenged by a leading palliative care expert who says that no diagnostic tools, tests or clinical examinations can reliably predict such a timeframe.
Scott Murray is Emeritus Professor of Primary Palliative Care at the University of Edinburgh in Scotland and a former medical missionary who worked for the Presbyterian Church at Chogoria Hospital in Kenya in the 1980s, where he helped improve outcomes for mothers in childbirth and children dying of measles.
“I am passionate to spread the gospel of early palliative care to all who are suffering in the last years of life,” Murray said.
He has recently vocalised his concerns about the lack of medical accuracy behind the six-month timeframe often touted as a key legal threshold for assisted dying.
Labour MP Lauren Edwards will reintroduce legislation to grant terminally ill adults in England and Wales the legal right to end their lives, reviving a measure that passed the House of Commons before stalling in the House of Lords. The identical bill, which allows mentally competent adults given six months or less to live to access assisted dying under specific safeguards, faces renewed backlash from Christian leaders and medical professionals.
Murray, an academic family physician, told Christian Daily International of his concerns that governments and pro-assisted suicide campaigners are pushing for legislation without considering the diagnostic realities facing doctors who must make life-or-death decisions. He called it “vital” that the public make a fully informed decision about end-of-life care and assisted suicide.
Murray is a recognized authority on palliative issues. Earlier this year, he was presented with the Dame Cicely Saunders International Award 2026 in recognition of his outstanding contributions to primary palliative care and reducing care inequities.
“I started a research group in the department of family medicine and published many analyses about the potential of primary care to deliver palliative care universally,” Murray said. “I believe this is an important ‘learning moment’ when the general public can start to understand the potential benefit of receiving early support/palliative care in parallel with curative treatment. Both and not either/or!”
In a January briefing provided to the House of Lords in London, Murray and his colleagues - Mark Taubert, Professor of Palliative Medicine at Velindre University NHS Trust, Cardiff, and Thanos Goltsos, Senior Lecturer of Management Science at Cardiff Business School - detailed their concerns about the unworkability of the six-month safeguard in attempts to legislate assisted suicide across the U.K.
“The proposal to make eligibility dependent on a clinician’s judgement that a person is ‘expected to die within six months’ might appear a reasonable safeguard,” Murray and his colleagues wrote. “But evidence from palliative care, primary care, and prognostic research paints a much more uncertain picture. Predictions are highly unreliable, and with modern treatments, forecasting this is largely guesswork.”
Doctors need to know what degree of statistical confidence is required to rule if a patient will die within six months. However, calls to define that degree of uncertainty have been ignored, the three academics noted. They added that several public figures who have publicly campaigned for assisted suicide eligibility based on terminal prognoses have continued living for years.
“No validated clinical tools or tests exist to make such determinations with sufficient reliability for life-ending decisions,” Murray and his team emphasized. “This lack of reliable knowledge places an undue burden on clinicians, who may face pressure to make prognoses they cannot substantiate, exposing them to legal risks and ethical dilemmas.”
While distinct patterns of physical decline help clinicians anticipate general care needs for conditions like cancer, organ failure, and frailty, the experts stressed that these trajectories cannot precisely forecast how long an individual patient has left to live.
“The ‘six-month rule’ used in some countries for admission to hospice was never intended as a clinical truth,” Murray and his colleagues added.
“Translating this administrative guideline into a legal threshold for assisted dying is therefore problematic and dangerous. If eligibility depends on a prognosis that cannot be made accurately, people could be approved for and have an assisted death when they might otherwise have lived for many months or years, with good quality of life and further treatment options.”
They argued that any assisted suicide legislation should be built on criteria that are objective, transparent, and evidence-based: “Such evidence is sadly currently lacking, despite the practice having been decriminalized in numerous countries.”
Although medical prognostication relies on population-level averages, predicting an individual’s exact survival time remains notoriously inaccurate. Studies show doctors' estimates in terminal cases can be wrong up to 80 per cent of the time.
Government benefit data cited by the team revealed that approximately 20 per cent of patients fast-tracked for end-of-life benefits after being given six months to live were still alive three years later.
Consequently, Murray and his co-authors warned that enforcing a strict six-month legal threshold relies on statistical guesses that could lead to irreversible errors.
In a letter published in the Scottish edition of The Times in February, Murray and his colleagues again challenged the evidence base behind proposals surrounding Liam McArthur’s bill to legalize assisted suicide in Scotland.
“Terminal care as defined in this bill may last for years, predictions are highly unreliable, and with modern treatments, such forecasting is pure guesswork,” they wrote. “A six-month life-expectancy is not a clinical truth ... All legislation must be built on criteria that are as objective, transparent, and as evidence-based as possible.”
Scotland’s Parliament later voted on March 17 to reject a bill that would have legalized assisted suicide for terminally ill adults.
Writing in the British Medical Journal (BMJ) in March 2025, Murray noted that while six-month prognostic criteria are used in Australia, New Zealand, and several U.S. states, the inherent challenges of prognostication remain dangerously underexplored.
“Prognostic eligibility criteria are limited by the fact that prognosis is inherently uncertain, and there are no valid tools, tests, or clinical examinations that can reliably and safely identify that a person is expected to die within six months,” he said.
