Gastroenterology

Rome IV Cyclic Vomiting Syndrome calculator

Enter the published formula inputs below to calculate and interpret this score.

Clinical inputs

Stereotypical acute vomiting episodes lasting under 1 week

Discrete episodes in the prior year

episodes

Allowed range: 0–40 episodes

Episodes in the past 6 months

episodes

Allowed range: 0–20 episodes

Episodes are at least 1 week apartNo vomiting between episodes

Months since symptom onset

months

Allowed range: 0–240 months

The source requires symptoms over the last 3 months and onset at least 6 months earlier.

Months the criteria have been fulfilled

months

Allowed range: 0–24 months

The source requires symptoms over the last 3 months and onset at least 6 months earlier.

Result

4 fields remaining

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Professional use only

For qualified clinicians. Independently verify inputs, calculations, source guidance, and applicability before any clinical action. This calculator does not replace clinical judgment.

Source: Stanghellini V, Chan FKL, Hasler WL, et al. Gastroduodenal disorders. Gastroenterology. DOI: 10.1053/j.gastro.2016.02.011. PMID: 27147122. Adult cyclic vomiting syndrome requires stereotypical episodes of vomiting with acute onset and duration less than 1 week, at least three discrete episodes in the prior year and two episodes in the past 6 months occurring at least 1 week apart, and absence of vomiting between episodes. Other milder symptoms may occur between cycles. The nausea-and-vomiting section requires criteria for the last 3 months with onset at least 6 months earlier. Migraine history is supportive only. (2016)

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Clinical inputs

Stereotypical acute vomiting episodes lasting under 1 week
Discrete episodes in the prior yearAccepted range: 0 to 40
Episodes in the past 6 monthsAccepted range: 0 to 20
Episodes are at least 1 week apart
No vomiting between episodes
Months since symptom onsetAccepted range: 0 to 240
Months the criteria have been fulfilledAccepted range: 0 to 24

Primary source

Stanghellini V, Chan FKL, Hasler WL, et al. Gastroduodenal disorders. Gastroenterology. DOI: 10.1053/j.gastro.2016.02.011. PMID: 27147122. Adult cyclic vomiting syndrome requires stereotypical episodes of vomiting with acute onset and duration less than 1 week, at least three discrete episodes in the prior year and two episodes in the past 6 months occurring at least 1 week apart, and absence of vomiting between episodes. Other milder symptoms may occur between cycles. The nausea-and-vomiting section requires criteria for the last 3 months with onset at least 6 months earlier. Migraine history is supportive only. (2016)

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