Biological Age Before Surgery: What a Study of 430,000+ Patients Suggests
Medical Strategy & Clinical Leadership
MD, PhD in Molecular Diagnostics (Cum Laude), with over 27 years of clinical practice in precision, regenerative, functional, and integrative medicine. She is Chief Scientific Officer at Longevity.Tech.fund and Chief Medical Officer at HealthyLongevity.clinic.
Biological age may help hospitals predict and address postoperative risk more accurately than the birth certificate alone.
What the Study Found
A study of over 430,000 surgical patients across the UK, US, and South Korea used PhenoAge, a biological clock. It classified patients as fast agers or normal agers.
Fast agers had a 49% higher one-year mortality risk than normal agers. That result held after adjusting for chronological age, frailty, comorbidities, ASA status, and surgical complexity.
Why Chronological Age Falls Short
A 60-year-old can carry the surgical risk of an 80-year-old. The same birth certificate can hide very different recovery odds. However, most pre-op checklists have no way to catch that difference.
Chronological age is useful but incomplete. Consequently, the study suggests that biological age may add prognostic information beyond established perioperative risk measures.
Why the Score Is Practical
PhenoAge uses routine bloodwork that hospitals already draw before many surgeries. It does not require a new test. Therefore, a hospital could trial the score without new equipment or a new patient visit.
The finding also replicated across three more cohorts. In addition, one academic centre validated it prospectively.
What the Study Did Not Test
The study did not test whether changing anaesthetic plans, monitoring, or recovery pathways according to PhenoAge improves outcomes. That limit matters. The signal is worth testing, but it is not a mandate to redesign care.
The Next Step: Implementation Research
The next step is prospective implementation research. Does adding biological age to standard risk assessment improve decisions and patient outcomes enough to justify routine use?
Hospitals can start by pairing the score with their existing risk tools in a pilot. As a result, they gather their own evidence before they change any pathway.
How a Hospital Could Pilot the Score
A pilot can run alongside current practice. First, calculate PhenoAge from the bloodwork that already exists in the pre-op record. Second, record the result next to the usual risk measures. Third, follow outcomes over twelve months, without changing the care plan.
Consequently, the hospital builds its own data and learns whether the score adds information for its own patients. Furthermore, the pilot does not require clinicians to act on the score until evidence supports it.
How Biological Age Fits Beside Existing Risk Tools
The study adjusted for frailty, comorbidities, ASA status, and surgical complexity, and the signal remained. Therefore, biological age does not replace these tools. It may sit beside them and flag patients that the usual checklist misses.
Limits Hospitals Should State Plainly
Hospitals should tell clinicians what the score can and cannot do. It can flag higher risk. However, it cannot yet tell the team which change in care will help. In addition, a single number can feel more certain than it is. Teams should treat it as one input among several.
Assign an Owner to the Pilot
Clinical leaders should also decide who owns the pilot. A named physician, an analyst, and a hospital lead can share the work. Consequently, the team can report findings to the surgical committee on a fixed schedule. In addition, clear ownership keeps the pilot from turning into another dashboard that nobody reads. Finally, the pilot should publish its method inside the hospital. Colleagues can then challenge the approach, and the results will carry more weight with surgeons and anaesthetists.
Personalised Medicine Inside the Hospital
This is what personalised medicine looks like inside a hospital. It is not a wellness trend. It is a pre-op decision tool. Furthermore, it shows that longevity science can serve patients long before it reaches a wellness clinic.
Key Takeaways
Biological age may add information to surgical risk assessment. In the study, fast agers had a 49% higher one-year mortality risk after adjustment. However, the study did not test changes in care. Therefore, hospitals should pilot the score beside existing tools and gather their own outcome data. Furthermore, routine bloodwork keeps the pilot simple. Evidence from implementation research should decide whether the score earns a place in routine use.
Frequently Asked Questions
What is PhenoAge?
PhenoAge is a biological clock calculated from routine bloodwork. It estimates how fast a person is aging compared with the same chronological age.
What did the 430,000-patient study find?
Patients classified as fast agers had a 49% higher one-year mortality risk than normal agers after surgery. The result held after adjusting for age, frailty, comorbidities, ASA status, and surgical complexity.
Does biological age replace existing surgical risk scores?
No. The study suggests it may add prognostic information beyond established perioperative risk measures. It did not test replacing them.
Did the study show that changing care according to PhenoAge improves outcomes?
No. The study did not test whether changing anaesthetic plans, monitoring, or recovery pathways according to PhenoAge improves outcomes.
What should hospitals do with this finding?
Treat it as a signal worth testing. The next step is prospective implementation research on whether adding biological age to standard risk assessment improves decisions and outcomes.