Interview Hot Topic · Ethics & Society

Health inequalities & mental health

Where you’re born can cost you a decade of life. Most of what makes people healthy or ill happens outside the clinic — and interviewers want to know whether you understand that, and what a doctor can realistically do about it. This is the topic that reveals how you think about fairness in medicine.

Strong EPQ topic Ethics & Society 12 min read Last reviewed Oct 2026

Why this comes up

Medicine is built on fairness — care based on need. So interviewers probe whether you grasp that health is shaped mostly by social conditions, and whether you can think maturely about a doctor’s role when the causes lie beyond the consulting room.

You don’t need statistics memorised. You need to explain what health inequalities are, understand the idea of social determinants, and — the key test — say honestly what a doctor can and can’t do about them.

How will this be asked?

“What can a doctor do about causes of ill health that lie outside the clinic?”

“Why do people in poorer areas have worse health?”

The best answers are honest about the limits of medicine — a doctor can’t end poverty — while still showing what one can do: advocate, treat holistically, signpost, and push for prevention.

What health inequalities are

Health inequalities are unfair and avoidable differences in health between groups of people — by income, region, ethnicity or other factors. The headline fact: in the UK, people in the poorest areas live fewer years, and crucially fewer years in good health, than those in the richest. The gap in healthy life expectancy can be close to two decades.

The word that matters is avoidable. These aren’t random differences; they track closely with disadvantage — which is what makes them a justice issue, not just a medical one.

The social determinants of health

Here is the central idea. The social determinants of health are the conditions people live in — income, housing, education, work, environment, food. These shape health far more than healthcare itself does. Sir Michael Marmot’s landmark Marmot Review (Fair Society, Healthy Lives) called these the “causes of the causes”, and a follow-up found the gap had widened.

Health is shaped mostly by wider factors like income, housing, education and environment, and only a smaller share by healthcare itself. Healthcarethe smaller share Wider social & economic conditionsincome · housing · education · work · environment What shapes a population’s health — most of it sits outside the NHS
The uncomfortable truth behind health inequalities: most of what keeps us healthy or makes us ill is decided long before anyone reaches a doctor.

One more idea worth a mention: the inverse care law (Julian Tudor Hart) — the observation that those who most need care often have the least access to it. It captures health inequality in a single phrase.

Mental health

Mental health is deeply tied to inequality — poverty, insecurity and poor housing all worsen it — and demand has risen sharply, especially among young people. Two ideas are useful:

  • Parity of esteem — the principle that mental health should be valued equally to physical health. It’s official policy, but in practice funding and waiting times often lag behind.
  • Access gaps — long waits for talking therapies and for children’s services (CAMHS) mean many wait a long time for help, and problems can escalate meanwhile.

What a doctor can actually do

This is the heart of the interview answer. Be honest about the limits — and clear about the real levers:

What a doctor can do

  • Treat holistically — see the person and their circumstances, not just the illness
  • Advocate for patients and communities
  • Social prescribing — link patients to non-medical support (debt advice, exercise, community groups)
  • Use every contact to support prevention and health

The honest limits

  • A doctor can’t end poverty or fix housing alone
  • The biggest causes need action across government
  • Clinic time is short; needs are vast
  • Risk of medicalising problems that are really social

Through the four pillars

This topic is justice through and through — but it touches all four.

Justice

Fairness in health.

Avoidable gaps in life expectancy by income are the clearest justice problem in medicine.

Beneficence

Doing good for the patient.

Holistic care and social prescribing address the real drivers of a patient’s ill health.

Non-maleficence

Avoiding harm.

Beware medicalising social problems, or making patients feel blamed for circumstances beyond their control.

Autonomy

Respecting the person.

Supporting people to make healthy choices — while recognising those choices are shaped by what’s around them.

Straight to the point

In the interview

This topic rewards maturity and empathy. Show you understand that health is mostly made outside hospitals, and that a doctor’s role is real but bounded.

What the interviewer is really marking

  • Understanding — health inequalities and the social determinants.
  • Insight — the “causes of the causes” and the inverse care law.
  • Realism — what a doctor can and can’t do.
  • Compassion — without blaming patients for their circumstances.

A model answer, in about 45 seconds

Question: “What can a doctor do about causes of ill health outside the clinic?”

Frame · “Most of what makes people healthy — income, housing, education — sits outside the NHS. The Marmot Review called these the ‘causes of the causes’, and they drive big, avoidable gaps in life expectancy.”

Be honest · “So a doctor can’t fix poverty alone — that needs action across government. But that doesn’t make them powerless.”

Show the levers · “They can treat holistically, advocate for patients, use social prescribing to link people to support, and back prevention. Recognising both the power and the limits of the role is, I think, what good medicine looks like here.”

Do & don’t

Do

  • Explain the social determinants
  • Name the Marmot Review or inverse care law
  • Be honest about medicine’s limits
  • Give concrete levers (advocacy, social prescribing)

Don’t

  • Blame patients for “bad choices”
  • Claim doctors can solve inequality alone
  • Ignore mental health and young people
  • Reduce it to “people should try harder”

Where to go next

  • This connects to the 10 Year Health Plan’s prevention shift and to obesity & public health.
  • The fairness reasoning rests on the four pillars — especially justice.

Practise this with a real interviewer

In a mock MMI with a Distinction Medic mentor you’ll be pushed to reason about fairness in health and a doctor’s role — with empathy and realism.

Book a free consultation

No commitment required – 30 minute call with a mentor