The Diploma in Child Health (DCH) is not one exam, and there is no single best DCH resource. It has two components that fail candidates for entirely different reasons: the Foundation of Practice (FOP) written paper and the DCH Clinical OSCE. The tool that suits a GP six weeks out with solid knowledge but slow reading speed is not the one that suits a first-timer with thin paediatric foundations. This article is a decision tree — segment yourself by profile, time and budget, then follow the branch. iatroX supplies the unseen-measurement baseline that tells you which branch you are actually on; it covers FOP-level knowledge, not the Clinical.
Start here: two components, two different resource problems
The DCH is run by the Royal College of Paediatrics and Child Health (RCPCH) and is designed for GPs and other clinicians who care for children but are not sitting the full MRCPCH (RCPCH, last checked 21 July 2026). It has two parts, and the single most useful thing to understand before you spend any money is that they are non-sequential: you can sit them in either order, and there is no requirement to pass the theory paper before the Clinical (RCPCH, 21 July 2026).
The theory component is the Foundation of Practice (FOP) paper — 100 single-best-answer questions in two hours, computer-based, with no negative marking. Crucially, this is the same FOP paper that MRCPCH candidates sit. There is no separate "DCH theory bank" in the market, because there is no separate DCH theory exam; the resources that prepare you are MRCPCH-FOP resources used for the DCH purpose. That single fact resolves most "which bank" confusion before it starts.
The DCH Clinical is a different animal: an OSCE-style circuit of eight stations, each nine minutes long with a four-minute break between them, including two communication stations, two history stations, a child-development station, a short clinical station, a data-interpretation station and a safe-prescribing station (RCPCH candidate guide, last checked 21 July 2026). Role-players appear in the communication and history stations. No best-of-five question bank prepares you for this. It needs coached practice, real paediatric contact time and structured feedback against the examiner rubric.
So you are not choosing "a DCH resource". You are choosing, separately, a knowledge tool for FOP and a performance tool for the Clinical — and the biggest waste of money in DCH revision is buying a second FOP bank when your actual gap is the Clinical.
What the official format tells you (and what it doesn't)
The RCPCH publishes the exam syllabus, sample papers, video tips and paid FOP online learning, and it states plainly that it "does not review external resources and cannot attest to their accuracy or currency" (RCPCH, 21 July 2026). Treat the official material as your format and calibration anchor: it tells you what a real FOP item looks like, how the interface behaves, and where the blueprint sits. It does not give you the question volume you need to build recall — the official sample set is finite by design. That is the gap a bank fills, and it is the only job the bank is genuinely better at than the College's own material.
Segment yourself first: six candidate profiles
Before any tool, decide which of these you are. Your dominant risk determines your first move — not the brand with the biggest question count.
| Profile | Dominant risk | First resource move |
|---|---|---|
| First attempt | Unknown blueprint coverage; over-buying | Take an unseen baseline; map weak domains before buying volume |
| Retake | Repeating the same errors; stale content | Error-log review + fresh unseen items, not a re-run of the old bank |
| GP / doctor caring for children (portfolio, not full-time paeds) | Patchy exposure to acute/inpatient paediatrics | Prioritise the domains you rarely see clinically; book Clinical practice early |
| Weak foundations | Gaps in core knowledge | Teaching/reference source first, then a bank for retrieval |
| Strong knowledge, poor pacing | Timing out on FOP at ~72s per item | Timed mixed blocks, not more content |
| Strong MCQ, weak practical | Passing FOP but under-prepared for the Clinical | Modality tool: coached OSCE practice, role-play, real contact time |
Most candidates are a blend, but one risk usually dominates. Name it, and the rest of the tree follows.
The minimum effective stack
You do not need a shelf of products. For most candidates the minimum effective stack is four slots, and two of them may be empty:
- One primary Q-bank for FOP knowledge and retrieval (an MRCPCH-FOP bank used for the DCH purpose).
- Official calibration material from the RCPCH — syllabus, sample paper, interface familiarisation. Non-negotiable, and largely free.
- One teaching or reference source, only where foundations are weak — a paediatrics reference, the RCPCH FOP online learning, or a case book. Skip it if your knowledge is already solid.
- One modality tool for the Clinical, only if you are sitting the Clinical soon — a course, a study partner, or supervised clinical sessions. An MCQ bank cannot fill this slot.
Adding a second FOP bank rarely helps; it duplicates coverage and dilutes your error log. The two-Q-bank rule — add a second bank only to measure on unseen items, never to double your reading — applies here as everywhere (the two-Q-bank rule).
Budget bands (verify every price on the day you buy)
Prices move, and vendor subscription lengths change; confirm each figure on the product page before you pay. The bands below are about structure, not exact numbers.
| Band | FOP knowledge | Clinical | Notes |
|---|---|---|---|
| Free / low-cost | RCPCH sample papers + iatroX free UK-core items for unseen measurement | Study partner + your own clinical sessions; RCPCH candidate guide | Viable if your knowledge is strong and you have paediatric contact time |
| One premium resource | A single MRCPCH-FOP bank (for example PassPaeds or Pastest — verify current price) | One structured Clinical course or coached block | The commonest sensible stack for a working GP |
| Comprehensive stack | Premium FOP bank + iatroX for unseen transfer practice and analytics | Course + repeated supervised OSCE practice + reference source | Justified only for weak foundations or a prior fail |
PassPaeds reports an FOP bank of over 1,200 questions described as suited to the DCH theory component, with unlimited timed mocks (vendor-reported, 21 July 2026). Pastest reports a combined FOP/TAS bank of 4,000+ questions and notes the FOP exam "is also taken by GPs doing the DCH" (vendor-reported, 21 July 2026). Neither publishes a DCH-specific product because none is needed — both are FOP banks, and FOP is the DCH theory paper. Confirm current counts and prices on each vendor's page.
Time bands: what to omit, not what to add
The failure mode under time pressure is trying to do everything slower. Instead, decide what to cut.
Under four weeks. Do not start a new full bank. Take one unseen timed block to find your two weakest domains, drill only those, and do daily short mixed sets for pacing. Omit teaching videos and any second resource. If you are also sitting the Clinical inside four weeks, protect two coached practice sessions and cut FOP volume to make room.
Four to twelve weeks. The standard window. Run one primary FOP bank as retrieval (topic-filtered only where a domain is genuinely weak, mixed thereafter), calibrate weekly against unseen items, and begin Clinical practice at week two if the Clinical is in scope. Omit the second bank.
More than twelve weeks. You have room for a teaching/reference source to rebuild foundations before the bank, plus spaced review. The risk here is drift and passive re-reading — schedule unseen measurement fortnightly so you notice plateaus early. Omit nothing essential, but do not let the extra time become an excuse to re-watch content instead of retrieving it.
The decision matrix: platform → best job
Each resource has one job it does best. Buy the job, not the brand.
| Resource | Best job | Not the right tool for |
|---|---|---|
| RCPCH official material (syllabus, sample papers, FOP online learning) | Official calibration and format truth | High-volume retrieval |
| PassPaeds (FOP bank) | FOP volume and mock practice | The Clinical OSCE |
| Pastest (FOP/TAS, Clinical cases) | FOP volume + a large clinical-case library for teaching | Replacing real coached OSCE practice |
| iatroX | Unseen-MCQ measurement, UK-core knowledge, Socratic review of misses | The DCH Clinical (it does not simulate the OSCE) |
| Structured Clinical course / study partner / supervised sessions | Realism and performance practice for the OSCE | Building underlying knowledge |
Cannibalisation guardrail. This hub deliberately keeps platform descriptions short. For the detailed evidence on any single product — its interface, explanation quality and blueprint fit — read the narrow child audit for that platform and the iatroX comparison hub rather than expecting a full teardown here. The job of this page is the decision, not the review.
Three worked candidate walk-throughs
Profile A — first-attempt GP, weak foundations, ten weeks, sitting FOP only. Week one: RCPCH sample paper plus a 40-item unseen baseline to expose weak domains (say, neonatology and child development). Weeks two to four: reference source plus topic-filtered bank blocks on those two domains, 30 items a day, every miss logged with an error code. Weeks five to eight: switch to mixed timed blocks; calibrate on unseen items each weekend. Weeks nine to ten: two full timed mocks, review high-confidence errors only. Exit criterion: unseen timed accuracy stable above your working threshold across two consecutive mixed blocks, with no domain floored below the rest.
Profile B — strong knowledge, poor pacing, five weeks, FOP. The problem is not content; it is 72 seconds per item. Skip the reference source entirely. Do daily 60-item timed mixed blocks under strict clock discipline, reviewing only the items that were slow or wrong. Use unseen items so you are measuring speed on genuinely new stems, not recall of seen ones. Exit criterion: completing full-length timed blocks with time to spare and accuracy holding — pacing, not percentage, is the readiness signal.
Profile C — passed FOP, anxious about the Clinical, eight weeks. A bank is the wrong tool here. Allocate the eight weeks to the eight-station format: two coached history stations, two communication stations with a role-player, a child-development run-through, a short clinical verbalisation, a data-interpretation set and a safe-prescribing station rehearsed against the SmPC/eMC and NICE/CKS. Book real paediatric clinics for exposure. Use iatroX only to keep FOP-level knowledge warm underneath the practical work. Exit criterion: you can complete a full mock circuit to time with a colleague marking against the RCPCH station descriptors.
The decision tree in one page
| If this is true | Then your next move is |
|---|---|
| You have not taken an unseen baseline | Take one before buying anything |
| Weak foundations, > 8 weeks | Reference source first, then one FOP bank |
| Strong knowledge, timing out | Timed mixed blocks; no new content |
| Passing FOP mocks, Clinical soon | Stop buying banks; book coached OSCE practice |
| A domain is floored on the coverage table | Targeted blocks on that domain only |
| Under four weeks, unprepared | Triage to two weakest domains; do not start a new bank |
| Everything green on unseen timed blocks | Stop adding questions; consolidate and rest |
The evidence hierarchy behind every recommendation
When resources disagree, rank the evidence. Official material first for format and blueprint — the RCPCH defines the exam, not any vendor. Primary UK guidance next for clinical content: NICE, CKS, SIGN, the SmPC/eMC for medicines, and NHS clinical content (this is a UK paediatric exam, so anchor every medicines fact to current UK sources). Vendor pages for product facts only — counts, prices, features — always dated and labelled vendor-reported. Independent testing and your own unseen scores last for user experience and readiness. A vendor's pass-rate claim is marketing; your unseen timed accuracy is data.
Three mistakes this decision tree is designed to stop
The first is buying volume you cannot finish — a 4,000-item bank is not four times better than a 1,000-item bank if you complete a third of either. The second is treating an FOP percentage as Clinical readiness; the two components share almost no failure mode, and a strong theory score tells you nothing about a communication station. The third is skipping official calibration because a bank feels more productive — the finite official sample is the only material guaranteed to match the real interface and blueprint, and your Q-bank percentage is not your exam score.
FAQ
How do I know whether I have covered the full DCH blueprint? Map your practice against the RCPCH FOP syllabus domain by domain, not by counting questions done. Build a simple coverage table with a row per domain and columns for questions attempted, first-attempt accuracy, date last reviewed and confidence. You have covered the blueprint when every domain has adequate unseen sample volume behind it and none is floored well below the others — completion of a bank is not the same as coverage, because a bank can over-sample easy domains and under-sample the ones that fail candidates (completion is not coverage).
Can one question bank be enough for DCH? For the FOP theory paper, one well-matched MRCPCH-FOP bank plus the official RCPCH sample material can be enough, provided you also measure on unseen items so your score is not inflated by recall of questions you have already seen. For the DCH Clinical it is never enough — no MCQ bank prepares you for an eight-station OSCE with role-players. So the honest answer is one bank for one component, and a different kind of tool entirely for the other.
What should I measure instead of my overall Q-bank percentage for DCH? Measure unseen timed accuracy by domain, your pacing against the roughly 72-second-per-item budget, your rate of high-confidence errors (the dangerous kind), and your retention of previously missed items after a spacing interval. A single headline percentage hides all four. Two candidates on 78% can have completely different readiness if one is fast, calibrated and even across domains while the other is slow, over-confident and carried by two strong topics.
When should I stop doing new DCH questions? Stop when new questions stop changing your behaviour — when your unseen timed accuracy has plateaued across two or three mixed blocks, no domain is floored, your pacing is comfortable and your error log has gone quiet. At that point additional questions mostly reassure rather than inform, and your time is better spent consolidating misses, resting, or — if the Clinical is in scope — practising the OSCE. Doing more questions past this point is sunk-cost studying, not preparation.
Which DCH resource should I use for my weakest component? Match the tool to the component. If your weak component is FOP knowledge, use a focused MRCPCH-FOP bank with topic filtering plus unseen measurement. If it is FOP pacing, use timed mixed blocks, not more content. If your weak component is the Clinical, an MCQ bank is the wrong tool entirely — use coached OSCE practice, a study partner, real paediatric contact time and the RCPCH station descriptors, and reserve iatroX for keeping the underlying knowledge warm.
Editorial notes and references
Written by Dr Kolawole Tytler, NHS GP and founder of iatroX. Last checked 21 July 2026. Vendor question counts and prices (PassPaeds, Pastest, and any course fees) are vendor-reported as of 21 July 2026 and change without notice — verify each on the product page on the day you buy. Disclosure: iatroX operates a UK question bank and is therefore a competitor to the FOP banks named here; this article confines the iatroX role to unseen-MCQ measurement and FOP-level knowledge, and states plainly that iatroX does not reproduce the DCH Clinical OSCE. Corrections are welcome via the feedback route on iatrox.com. References: RCPCH Diploma of Child Health and FOP pages and DCH Clinical candidate guide (rcpch.ac.uk); PassPaeds (passpaeds.com); Pastest MRCPCH (pastest.com); and, internally, Your Q-Bank Percentage Is Not Your Exam Score, completion is not coverage and the iatroX comparison hub.