About the Rome IV Criteria for Paediatric Irritable Bowel Syndrome
Abdominal pain at least four days per month over at least two months, associated with one or more of: relation to defecation, a change in stool frequency, or a change in stool form. Plus two further requirements. In a child with pain and constipation, the pain must not resolve when the constipation resolves — Rome IV states this explicitly, and a child whose pain disappears once the constipation is treated has functional constipation, not IBS. And after appropriate evaluation the symptoms cannot be fully explained by another condition. The thresholds are far lower than the adult criteria's six months and one day a week, because a child does not need adult-level symptom frequency to be significantly affected.
Formula
Paediatric IBS = ≥ 2 months
AND abdominal pain ≥ 4 days/month associated with ≥ 1 of:
related to defecation | change in stool frequency | change in stool form
AND (if constipation present) pain does not resolve when constipation resolves
AND another medical condition excluded after appropriate evaluation- Four days per month
- About once a week. The adult criteria require at least one day per week over three months with onset six months earlier, so the paediatric bar is markedly lower in both frequency and duration.
- The constipation clause
- Unique to the paediatric criteria. It cannot be assessed from the history alone — it requires treating the constipation and then reassessing the pain.
- Change in stool form
- Best captured with a Bristol scale and a stool diary rather than by asking a child to characterise their stools from memory.
- Two months and four days a month, against the adult six months and one day a week.
- Rome IV subtypes paediatric IBS by predominant stool form following the adult convention, though the subtypes carry less treatment weight in children.
- The constipation clause has no adult equivalent, because functional constipation and IBS-C are separated differently in adults.
- Alarm features are not part of the criteria but take a child out of the pathway entirely.
Interpreting the result
Treat the constipation first, to completion, in any child who has it. This is the single highest-value action: it is therapeutic in its own right, it tests the Rome IV constipation clause, and it prevents a child with treatable constipation being labelled with a chronic disorder. Once that is done and pain persists, give the diagnosis by name and explain the mechanism — children and families do markedly better with a stated diagnosis than with a list of normal results, and an unnamed symptom invites further testing that entrenches the problem. Limit investigation in the absence of alarm features; coeliac serology and a faecal calprotectin are reasonable, repeated endoscopy is not. Address school attendance in the first consultation and aim at function rather than symptom elimination, since function generally recovers first. For treatment, gut-directed hypnotherapy has the strongest paediatric evidence, with benefit sustained at long-term follow-up and home-based self-exercises shown non-inferior to therapist-delivered sessions — which matters where therapist time is scarce. Where criteria are not met, the failing criterion points somewhere useful: pain resolving with constipation is functional constipation, pain unrelated to defecation with epigastric localisation is functional dyspepsia, and episodic incapacitating pain with long well intervals is abdominal migraine.
| Score | Band | What it means | Action |
|---|---|---|---|
| Criteria met | Paediatric irritable bowel syndrome | Pain at least four days a month related to defecation or stool change, persisting after constipation is treated | Name the diagnosis; limit further investigation; prioritise school attendance; consider gut-directed hypnotherapy or CBT |
| Criteria not met — pain resolves with constipation | Functional constipation, not IBS | The pain disappears once the constipation is cleared | Manage as functional constipation with proper disimpaction and prolonged maintenance |
| Criteria not met — frequency or duration unsatisfied | Criteria not met | Fewer than four days a month, or under two months | Reassess after a symptom diary; consider functional abdominal pain NOS if the pattern persists |
| Alarm features present | Outside the pathway | Weight loss, blood in stool, nocturnal symptoms, perianal disease, fever or family history of IBD | Investigate rather than applying a functional label |
What the Paediatric Irritable Bowel Syndrome needs (4 inputs)
- Criteria fulfilled for at least 2 months prior to diagnosis
- Two months, against six months in the adult criteria. The paediatric committee shortened it on the basis that requiring half a year of symptoms in a child missing school is not defensible.
- Abdominal pain at least 4 days per month, associated with defecation, a change in stool frequency, or a change in stool form
- One or more of the three associations is sufficient — the same structure as the adult criteria, at a lower frequency threshold of four days a month rather than one day a week.
- In a child with pain and constipation, the pain does not resolve when the constipation resolves
- The criterion clinicians most often skip. Rome IV states it explicitly: children whose pain resolves with the constipation have functional constipation, not IBS. Testing it requires treating the constipation properly rather than assuming.
- After appropriate evaluation, the symptoms cannot be fully explained by another medical condition
- Coeliac disease and inflammatory bowel disease are the two that most often present this way and are worth considering explicitly.
What it returns
- Criteria met or not met
- All four criteria are required.
- Which criterion is outstanding
- Reported when criteria are not met — most commonly the constipation clause, which redirects to functional constipation.
How it is calculated
Paediatric IBS reflects disordered gut-brain interaction: visceral hypersensitivity, altered motility, changes in the intestinal microbiota, low-grade immune activation in some children, and central amplification of visceral signals. What distinguishes the paediatric picture is how much of the variance sits at the central and psychosocial end. Post-infectious onset is well described, as is onset after a period of significant stress, and anxiety is both a risk factor for developing symptoms and a strong predictor of how disabling they become. That is not a statement that the pain is psychological — the hypersensitivity is measurable — but it does explain why interventions aimed at the gut alone underperform, and why the psychological therapies have the best trial data in this population. It also explains the constipation clause. A constipated child has a genuine mechanical driver of pain sitting on top of whatever sensitisation exists, and until that driver is removed there is no way to know whether the sensitisation is doing anything at all.
Facts & figures
| Element | Children (H2b) | Adults |
|---|---|---|
| Duration | 2 months | 3 months, onset ≥ 6 months earlier |
| Pain frequency | ≥ 4 days a month | ≥ 1 day a week |
| Associations required | ≥ 1 of 3 (defecation, frequency, form) | ≥ 2 of 3 |
| Constipation clause | Explicit — pain must persist after constipation resolves | No equivalent |
| Exclusion clause | Stated as a criterion | Handled outside the criteria |
| Subtyping | By predominant stool form | By predominant stool form |
The paediatric criteria require only one of the three associations where the adult criteria require two — a deliberate loosening alongside the shorter duration.
Evidence
Derivation — Rome Foundation, child/adolescent committee
2016Consensus criteria from the Rome IV committee on childhood functional gastrointestinal disorders in the child and adolescent age band, published in Gastroenterology in 2016.
Consensus-derived. The distinctive addition was the explicit constipation clause, written to stop children with treatable constipation being labelled with a lifelong functional diagnosis.
Randomised trial — gut-directed hypnotherapy
2007Randomised controlled trial of gut-directed hypnotherapy against standard medical care in children with functional abdominal pain or irritable bowel syndrome, reported by Vlieger and colleagues in 2007.
Hypnotherapy was substantially more effective than standard care, with benefit sustained at long-term follow-up — the strongest paediatric evidence for any intervention in this group.
Randomised trial — home-based hypnotherapy
2017Randomised comparison of home-based hypnotherapy self-exercises against individual therapist-delivered hypnotherapy in paediatric IBS and functional abdominal pain, reported by Rutten and colleagues in 2017.
Home-based self-exercises were non-inferior on the primary outcome, materially improving access where therapist availability is the limiting factor.
How it compares
Paediatric Irritable Bowel Syndrome vs Rome IV IBS in adults
Shorter duration, lower frequency, one association instead of two, and a constipation clause with no adult equivalent.
The adult criteria require recurrent abdominal pain at least one day per week over three months with onset at least six months earlier, associated with two or more of the three features. The paediatric criteria require four days a month over two months with one or more association, and add the requirement that pain persist after any constipation resolves. Every one of those changes loosens the definition except the last, which tightens it in the one place where children are most often misclassified.
Paediatric Irritable Bowel Syndrome vs Paediatric functional constipation
The distinction Rome IV built a prospective test for — treat the constipation and see whether the pain remains.
Paediatric functional constipation requires two or more of its listed items over one month, and its own criteria state that the diagnosis applies where criteria for IBS are insufficient. The two are separated by what happens after treatment: a child whose pain disappears once the constipation clears has functional constipation, and one whose pain persists has IBS. Because this cannot be judged cross-sectionally, the assessment properly takes two appointments rather than one — which is the main reason the clause gets skipped.
Paediatric Irritable Bowel Syndrome vs Functional abdominal pain — not otherwise specified
The residual category that exists for children whose pain fits none of the three defined disorders, IBS included.
Functional abdominal pain NOS requires explicitly that criteria for IBS, functional dyspepsia and abdominal migraine are all insufficient. It is therefore not an alternative to IBS but a category reached after IBS has been considered and found not to fit — most often because the pain has no relation to defecation or to stool form. Management is broadly the same, which is worth saying to families who assume the vaguer label means a worse outlook.
Pearls & pitfalls
- Treat the constipation to completion first. It is both the treatment and the diagnostic test, and it is the step most often skipped.
- Four days a month over two months — using the adult thresholds in a child excludes patients who need help.
- The paediatric criteria need only one of the three symptom associations; the adult criteria need two.
- Give the diagnosis by name. 'The tests were normal' invites more tests; a named condition does not.
- Address school attendance at the first consultation, before absence has become the dominant problem.
- Use a Bristol scale and a stool diary rather than asking a child to characterise stools from memory.
- Coeliac serology and faecal calprotectin are reasonable; repeated endoscopy in the absence of alarm features is not.
- Gut-directed hypnotherapy has the best paediatric evidence, and home-based self-exercises were non-inferior to therapist sessions.
- Post-infectious onset and onset after a period of stress are both well described — asking what was happening when it started is worthwhile.
- Weight loss, blood in stool, nocturnal symptoms, perianal disease, unexplained fever or a family history of IBD take the child out of this pathway.
Critical actions
- Take a full stool history including frequency, form, straining and any withholding behaviour.
- Treat any constipation properly — disimpaction where needed, then adequate maintenance — before concluding the assessment.
- Reassess the pain after the constipation has cleared, which is what the Rome IV clause requires.
- Check for blood in the stool, nocturnal waking, perianal disease and delayed puberty before settling on a functional label.
- Plot growth; centile crossing changes the assessment.
- Send coeliac serology and consider faecal calprotectin where inflammatory bowel disease is plausible.
- Quantify school absence in days and start a graded return plan.
- Give the diagnosis explicitly and explain the mechanism to the child as well as the caregiver.
- Refer for gut-directed hypnotherapy or cognitive behavioural therapy where available.
Why this score exists
The constipation clause is the most consequential sentence in the paediatric abdominal pain chapter, and it is written as a subordinate remark. Rome IV could have relied, as the adult criteria do, on the separate functional constipation definition to sort these children out. It did not, because in children the two present as one thing: a child with hard infrequent stools and abdominal pain looks exactly like a child with IBS-C, and the distinction is invisible in a single consultation. So the committee made the test prospective rather than cross-sectional — treat the constipation, then look again. That is unusual in diagnostic criteria, which normally describe a state rather than prescribe an intervention, and it means the criteria cannot be completed on the day the child is seen. It is worth the inconvenience. The children it separates out are the ones who get completely better, and labelling them with a chronic disorder because nobody cleared the constipation first is an avoidable and surprisingly common harm.
About the creator
First author, Rome IV child/adolescent functional gastrointestinal disorders committee
Chaired the committee that produced the child and adolescent criteria, including H2b.
Co-author; paediatric functional gastrointestinal disorders
Contributed much of the epidemiology underpinning the paediatric abdominal pain criteria.
Lead author of the randomised trials of gut-directed hypnotherapy in paediatric IBS
Produced the trial evidence that underpins the recommended psychological treatment in this group.
Limitations
- Consensus criteria with no validation cohort; the four-days-a-month threshold is a judgement rather than a measured boundary.
- The constipation clause cannot be assessed at a single visit, so the criteria are frequently applied without it.
- Children characterise stool form unreliably without a Bristol chart and a diary, which are not always used.
- 'Appropriate evaluation' is undefined, so the amount of investigation preceding the diagnosis varies widely.
- Requiring only one of three associations makes the definition broad, and its specificity against organic disease has not been measured.
- Subtyping by predominant stool form carries less treatment implication in children than in adults.
- No severity grading, though severity rather than frequency drives school absence and disability.
- Nothing in the criteria addresses anxiety or the school context, both of which predict outcome more strongly than the symptoms.
If you are the patient
Irritable bowel syndrome in children means recurring tummy pain that is linked to going to the toilet — it may ease after opening the bowels, or come with stools becoming looser, harder, more frequent or less frequent than usual. It is common, it is real, and nothing is damaged. What is happening is that the nerves in the gut have become more sensitive than usual, and the signals between the gut and the brain are being turned up, so ordinary events like food moving through are felt as pain. One thing worth knowing before anything else: if your child is also constipated, doctors will want to treat that thoroughly first. That is not a delaying tactic. Constipation on its own causes tummy pain, and in a good number of children the pain disappears completely once the constipation is properly cleared — in which case this was never IBS at all, and the outlook is much simpler. Only if the pain is still there afterwards does the IBS diagnosis apply. Beyond that, the most useful thing is keeping up with school. It is very tempting to stay home on painful days, and completely understandable, but the longer the gap the harder going back becomes, and returning eventually becomes a bigger obstacle than the pain. Doctors usually aim for a gradual planned return rather than waiting for the pain to go, because in practice getting on with things comes back first. For treatment, gut-directed hypnotherapy has the best evidence in children — it sounds unusual but it works well, the benefit lasts for years, and much of it can now be done at home with recordings rather than requiring weekly appointments.
Frequently asked questions
What are the Rome IV criteria for IBS in children?#
Abdominal pain at least four days per month over at least two months, associated with one or more of: relation to defecation, a change in stool frequency, or a change in stool form. Plus, in a child with constipation, the pain must not resolve when the constipation resolves; and other medical conditions must be excluded after appropriate evaluation.
How do the paediatric criteria differ from the adult ones?#
Two months rather than six, four days a month rather than one day a week, and only one of the three symptom associations rather than two. Those changes all loosen the definition. The one addition that tightens it is the constipation clause, which has no adult equivalent.
What is the constipation clause and why does it matter?#
Rome IV states that in a child with pain and constipation, the pain must not resolve when the constipation resolves — children whose pain does resolve have functional constipation, not IBS. It matters because a constipated child with pain looks exactly like a child with IBS-C in a single consultation, and mislabelling commits a child who would get completely better to a chronic diagnosis.
How do you test the constipation clause?#
Prospectively. Treat the constipation properly — disimpaction if there is a faecal mass, then adequate maintenance for long enough — and then reassess the pain. It cannot be judged from the history, which means the assessment properly takes two appointments. That is the main reason the clause gets skipped.
What investigations does a child with suspected IBS need?#
Few, in the absence of alarm features. Coeliac serology is reasonable, as is faecal calprotectin where inflammatory bowel disease is plausible. Repeated endoscopy is not, and repeated investigation is actively counterproductive because it entrenches illness behaviour and delays the diagnosis that would allow management to start.
What treatment has the best evidence in children?#
Gut-directed hypnotherapy. A randomised trial found it substantially more effective than standard medical care with benefit sustained at long-term follow-up, and a later trial found home-based self-exercises non-inferior to therapist-delivered sessions — which makes it accessible where therapist time is limited. Cognitive behavioural therapy is a reasonable alternative where hypnotherapy is unavailable.
Why is school attendance emphasised so much?#
Because it predicts outcome more strongly than symptom severity, and because absence compounds. A child out of school for weeks acquires academic and social re-entry problems on top of the pain, and those become harder to solve than the original symptom. The goal is restored function rather than symptom elimination, since function usually recovers first.
What alarm features rule this out?#
Weight loss or centile crossing, blood in the stool, nocturnal symptoms that wake the child, perianal disease, unexplained fever, arthritis, delayed puberty, and a family history of inflammatory bowel disease or coeliac disease. Any of these means investigating rather than applying a functional label.
References
Original / primary reference
Treatment evidence
- Vlieger AM, Menko-Frankenhuis C, Wolfkamp SCS, Tromp E, Benninga MA. Hypnotherapy for Children With Functional Abdominal Pain or Irritable Bowel Syndrome: A Randomized Controlled Trial. Gastroenterology. 2007;133(5):1430-1436.
- Rutten JMTM, Vlieger AM, Frankenhuis C, George EK, Groeneweg M, Norbruis OF, et al. Home-Based Hypnotherapy Self-exercises vs Individual Hypnotherapy With a Therapist for Treatment of Pediatric Irritable Bowel Syndrome, Functional Abdominal Pain, or Functional Abdominal Pain Syndrome: A Randomized Clinical Trial. JAMA Pediatr. 2017;171(5):470-477.