This gap analysis is for a candidate deciding whether to buy — or rely on — a DGM revision course for the Part 1 Knowledge Based Assessment (KBA). The short answer is that a course can be a strong way to build structure and cover the blueprint, but no course reliably supplies the timed, unseen question volume the KBA rewards, and none prepares you for the Part 2 OSCE by itself. The principal limitation to name first is subtler: "DGM revision courses" is not one product to audit, but a sparse and variable category.
Be honest about what "DGM Revision Courses" means
There is no single, canonical DGM revision course the way there is a single UWorld or Pastest for larger exams. What exists is a scattered category: occasional study days and webinars run by NHS geriatric departments, small-group tutorials, and a handful of private providers who bundle lectures with a modest question set. The BGS states plainly that neither it nor the RCP endorses any particular course. That means every figure a course quotes — hours, lecture count, question count, pass "rates" — is vendor-reported and unverified against the exam body, and you must check each provider's current offering yourself.
| Attribute | Finding (last checked 21 July 2026) |
|---|---|
| Product type | A category, not one product: study days, webinars, small-group courses |
| Endorsement | None — BGS and RCP do not endorse any particular course |
| Question count | Varies; often none or a small bundled set — verify per provider |
| Price / contact hours | Not standardised; confirm each provider's current fee and duration |
| AI / adaptive features | Rare; verify |
| DGM components covered | Usually KBA content and sometimes OSCE technique — confirm per provider |
Because the category is this loose, this article audits the format of a typical DGM revision course against the exam, so the conclusions hold whichever specific course you are weighing.
The exam a course has to cover
The KBA is one online paper of 100 best-of-five questions in three hours, once a year, no negative marking, Hofstee-standard-set (RCP, last checked 21 July 2026). The OSCE is four live stations of roughly 1.5 hours total at the RCP's Liverpool centre — an Integrated Clinical Assessment pair, a Comprehensive Geriatric Assessment station and an Ethical and Legal Principles station — and you must pass the KBA first, with four years to complete it. iatroX covers the KBA knowledge and unseen-MCQ layer only; it is explicitly not an OSCE simulator, and neither is a lecture course.
Map the modules to the official blueprint
Take the course syllabus and lay it beside the RCP blueprint domain by domain. The blueprint's centre of gravity is common geriatric syndromes (around 40%): frailty, falls and fragility fracture, delirium, dementia and mood, continence, dizziness, pain and nutrition. Around it sit other illnesses in older people (~15%), pharmacology and therapeutics (~15%), rehabilitation and CGA (~8%), administrative/ethical/legal aspects (~10%), demographic and social factors (~5%) and the biology of ageing (~2%). Mark each domain as well covered, lightly covered or missing in the course. Two failure patterns are common: over-teaching the lecturer's own subspecialty (for example, a stroke-heavy course), and under-teaching the unglamorous but heavily weighted syndromes — continence, delirium and transfers of care — that decide marks.
Separate the passive assets from the active ones
List everything the course gives you and sort it into two columns. Passive assets are consumed: recorded lectures, slide decks, reading lists, notes. Active assets make you retrieve: question banks, timed mocks, marked answers, tutor feedback, small-group case discussion. Most revision courses are heavy on the passive column and thin on the active column, and it is the active column that predicts KBA performance. A course that is all video and no testing is a knowledge-delivery service, not exam preparation, however polished the lectures.
Evaluate question quality on fidelity, not testimonials
Where a course does include questions, judge them on evidence, not on five-star quotes. Check exam fidelity (five-option best-of-five, older-adult vignettes, application over recall); explanation depth (does the rationale teach the discrimination, or just name the answer?); image and data use (ECGs, imaging, bloods, assessment findings appropriate to older patients); recency (are the answers consistent with current NICE, CKS, SIGN, BGS guidance and the SmPC/eMC, and is there a review date?); and balance (does the set mirror the blueprint, or cluster around a few favourite topics?). A small set of high-fidelity, well-explained, current questions beats a large set of dated recall items.
The component gap: frailty, capacity, medicines, MDT
Four areas expose whether a course is genuinely sufficient. Frailty should be taught as a syndrome with recognition, grading and prognosis, not a buzzword. Capacity should be anchored in the Mental Capacity Act with worked scenarios, because the exam tests applied ethics and law, not definitions. Medicines should centre on deprescribing, adverse drug reactions and structured medication review using STOPP/START (referenced to the SmPC/eMC for drug detail), not drug-fact memorisation. Multidisciplinary and transfers-of-care scenarios should appear, because CGA and safe discharge are core geriatric competencies. If a course is silent on any of these, it is not sufficient alone — you need a practice tool that drills them.
A time-cost calculation for three schedules
Estimate the trade between hours consumed and hours retrieved, because a course that eats your revision time in passive viewing can cost you marks.
| Schedule | Course video/reading | Active retrieval | Risk |
|---|---|---|---|
| 12 weeks out | ~2–3 h/week | Build to 4–5 h/week | Healthy if retrieval rises over time |
| 6 weeks out | ~2 h/week | 5–6 h/week | Cut passive viewing hard; test daily |
| 3 weeks out | ≤1 h/week, gaps only | 6+ h/week timed | Course is now reference, not schedule |
The pattern is constant: the closer the exam, the more your hours must shift from watching to answering. A course used as a term-long scaffold is sensible; a course binged in the final fortnight displaces the practice that actually moves your score.
Who benefits most from a course
A revision course helps most where structure and accountability are the limiting factor. The first-time candidate who has never seen the blueprint gets a map. The retaker usually needs targeted question practice, not another pass through lectures. The international medical graduate benefits from the UK service, ethics and medicines framing a good course makes explicit. The weak-foundation learner benefits from taught scaffolding before self-testing. The candidate who is self-disciplined and time-poor often gets more from questions plus BGS resources than from scheduled lectures. Match the tool to your actual bottleneck, not to what feels productive.
Three ways candidates misuse a revision course
The first mistake is treating completion as competence — finishing every lecture and assuming the marks will follow, when the progress bar measures consumption, not retrieval. The second is scheduling the course late and bingeing it in the final fortnight, which displaces exactly the timed practice that moves a score in the last stretch; a course belongs early, as a scaffold, not late, as a comfort blanket. The third is trusting the lecturer's emphasis over the blueprint: a charismatic session on a niche interest feels valuable, but if it crowds out continence, delirium, capacity or transfers of care, it has cost you marks in the domains that actually dominate the paper. Each mistake shares a root cause — mistaking the feeling of productivity for evidence of learning — and each is corrected by the same discipline: convert what you watch into questions, and let unseen, timed performance, not hours logged, tell you whether the course is working.
A seven-day worked example
Give the course one job — deliver a domain — and give iatroX the measurement job. No proprietary-algorithm claims are involved; the loop is candidate-driven.
- Day 1: Watch only the course module on your weakest blueprint domain; nothing else.
- Day 2: Turn that module into ten questions of your own: discrimination, management, "why not the alternative?".
- Day 3: Sit a fresh, timed 30-item mixed block in iatroX; do not pre-read the module.
- Day 4: Code errors by domain and by cause (knowledge vs reading vs timing).
- Day 5: Return to the course or BGS resources only for the knowledge-gap errors.
- Day 6: Second unseen timed block; compare accuracy in the target domain with day 3.
- Day 7: Review the error log only; plan next week's single module.
Decision checklist: continue, supplement, switch or stop
- Continue the course if its modules map cleanly to the blueprint and it drives you to test, not just watch.
- Supplement it if the active column is thin: bolt on a question bank for unseen, timed volume.
- Switch away from a course that over-teaches one subspecialty and leaves continence, delirium or capacity thin.
- Stop paying for contact time you are not using; if your score now moves through questions, the course has done its job.
The bottom line
A DGM revision course can be a strong scaffold, especially for a first-timer or an IMG who needs the UK framing made explicit — but "sufficient" is the wrong bar. Sufficiency for the KBA is decided in the active column: timed, unseen, blueprint-balanced questions with honest explanations. Use the course to build and organise knowledge, then convert that knowledge into marks with a practice tool, and accept that neither the course nor the bank replaces the supervised preparation the OSCE demands.
Frequently asked questions
Is DGM Revision Courses enough for DGM on its own? Rarely, on its own, because most courses are weighted toward passive delivery and the KBA rewards active retrieval under time pressure. A course can cover the blueprint and give you structure, but unless it includes a substantial, high-fidelity, timed question component, it leaves the application-and-pace layer untested — and it cannot, by design, prepare you for the four live OSCE stations. Treat a course as the scaffold and add a question tool to make it sufficient.
Which DGM component does DGM Revision Courses not reproduce well? The OSCE, decisively. Recorded or even live lectures cannot replicate examining a standardised patient, communicating a capacity decision or performing a comprehensive geriatric assessment against the clock in front of examiners at Liverpool. Some courses offer OSCE-technique sessions, which help, but they are coaching, not the exam. On the KBA side, many courses also under-reproduce timed, mixed-domain conditions, which is the specific thing the paper measures.
How many DGM Revision Courses questions should I complete per day for DGM? If your course bundles questions, a realistic target is 20 to 40 per day in timed, mixed sets, rising as the exam approaches — but only if you have verified the set is high-fidelity and current, because volume of poor questions is worse than a smaller high-quality set. Where a course's question bank is small or absent (as many are; verify the vendor's current count), meet your daily quota in a dedicated bank such as iatroX and use the course for teaching instead.
When should I stop using DGM Revision Courses and move to mixed mocks? Shift the balance from around the six-week mark and complete it by the final fortnight. Early, the course leads and testing supports it; late, timed mixed mocks lead and the course becomes a reference you dip into only to repair specific gaps a mock exposes. If you find yourself re-watching lectures in the last two weeks instead of sitting full blocks, you have left the transition too late — the marks are now made by answering, not watching.
How should I combine DGM Revision Courses with iatroX without duplicating practice? Assign non-overlapping jobs and keep the flow one-directional. The course owns teaching a domain; iatroX owns measuring whether that domain survives fresh, timed conditions. Watch a module, test that domain in iatroX within a day or two, then let your error log — not the course running order — choose what you study next. You avoid duplication by never re-consuming a lecture you have already tested well and never re-testing an item you can now answer from memory.
Editorial notes and references
Written by Dr Kolawole Tytler, NHS GP and founder of iatroX. Last checked 21 July 2026. Because DGM revision courses are a fragmented, unendorsed category, every course figure in this article is vendor-reported and unverified against the exam body; confirm hours, question counts and prices with each provider before buying. Disclosure: iatroX operates a UK question bank that competes with course-bundled banks; this article confines iatroX to the unseen-measurement job that a lecture course does not claim to do, and it is not a substitute for the OSCE. Corrections are welcome via the feedback route on iatrox.com.
References: RCP Diploma in Geriatric Medicine exam page and syllabus/blueprint (February 2025), rcp.ac.uk; British Geriatrics Society DGM career page and statement on course endorsement, bgs.org.uk; iatroX DGM resource, iatrox.com/dgm, and DGM revision guide, iatrox.com/blog/dgm-revision-2026-question-banks-diploma-geriatric-medicine-study-resources; "Your Q-Bank Percentage Is Not Your Exam Score," iatrox.com/blog/qbank-percentage-not-your-exam-score.