Calculators & Tools

Rome IV — Functional Constipation

Children ≥4 years: ≥2 criteria at least once weekly for ≥1 month, without meeting IBS criteria.

1 What is the Rome IV — Functional Constipation?

The Rome IV — Functional Constipation is a GI & Liver scoring tool used in paediatric practice. Children ≥4 years: ≥2 criteria at least once weekly for ≥1 month, without meeting IBS criteria. It scores 6 criteria and interprets the total across 2 bands, so the number always arrives with the severity it implies rather than on its own. In PediAid each criterion is shown as a labelled option with the weight it carries, so the total can be checked rather than taken on trust.

2 When to use it

  • Grading severity at the bedside in GI & Liver
  • Recording an objective severity band in the case notes
  • Deciding when a total crosses the threshold for escalation
  • Re-scoring to track whether a child is improving or deteriorating
  • Checking the exact criteria of a score used infrequently

3 Formula & method

The score sums 6 criteria: ≤ 2 defaecations in the toilet per week; At least one episode of faecal incontinence per week; History of retentive posturing or excessive volitional stool retention; History of painful or hard bowel movements; Presence of a large faecal mass in the rectum; History of large-diameter stools that can obstruct the toilet. Totals are then banded: any score - Criteria not met: fewer than 2 criteria - Rome IV functional constipation not met. Reassess symptoms and consider other causes; 2 criteria or more - Criteria met: ≥2 criteria fulfilled for at least 1 month - functional constipation. Treat with disimpaction if needed, maintenance laxatives (PEG first line), toilet training and dietary advice.
  • For children <4 years the same criteria apply but require ≥1 month duration with ≥2 criteria (developmental age-appropriate).
  • Always exclude red flags: delayed meconium, ribbon stools, failure to thrive, abnormal neurology, anal abnormalities.
  • Source: Hyams JS et al. Functional disorders: children and adolescents. Rome IV. Gastroenterology 2016;150:1456-68.

4 Frequently asked questions

How many criteria does the Rome IV — Functional Constipation use?

6. They are ≤ 2 defaecations in the toilet per week; At least one episode of faecal incontinence per week; History of retentive posturing or excessive volitional stool retention; History of painful or hard bowel movements; Presence of a large faecal mass in the rectum; History of large-diameter stools that can obstruct the toilet.

What do the bands of the Rome IV — Functional Constipation mean?

The total is interpreted as: any score - Criteria not met: fewer than 2 criteria - Rome IV functional constipation not met. Reassess symptoms and consider other causes; 2 criteria or more - Criteria met: ≥2 criteria fulfilled for at least 1 month - functional constipation. Treat with disimpaction if needed, maintenance laxatives (PEG first line), toilet training and dietary advice.

Does the score replace clinical judgement?

No. It is a structured way to record and communicate severity. A clinician concerned about a child should act on that concern regardless of the total.

Where does this score come from?

For children <4 years the same criteria apply but require ≥1 month duration with ≥2 criteria (developmental age-appropriate).

Does it work offline?

Yes. Score definitions are bundled with the PediAid app, so the score computes without a connection.

For qualified clinicians. This page and the PediAid app are a clinical aid only. Calculations and reference data must be verified against the patient's clinical context, the source guideline and your local protocols before any treatment decision is made.