rome_iv_cnvs: Rome IV Diagnostic Criteria for Chronic Nausea Vomiting...

In cliot: Clinical Indices and Outcomes Tools

Rome IV Diagnostic Criteria for Chronic Nausea Vomiting Syndrome (CNVS)

Description

Evaluates the Rome IV criteria for diagnosing Chronic Nausea Vomiting Syndrome (CNVS). Diagnosis requires bothersome nausea and/or vomiting at least 1 day per week, exclusion of self-induced vomiting, eating disorders, regurgitation, and rumination, absence of organic disease, and symptom duration of at least 3 months with onset at least 6 months prior.

Usage

rome_iv_cnvs(nausea_at_least_1_day_per_week, vomiting_at_least_1_day_per_week,
             self_induced_vomiting_present, eating_disorder_present,
             regurgitation_present, rumination_present,
             organic_systemic_metabolic_disease_excluded,
             symptom_onset_ge_6_months_ago, symptoms_active_last_3_months)

Arguments

nausea_at_least_1_day_per_week	Numeric (0 or 1). Is bothersome nausea present at least 1 day per week? (1 = Yes).
vomiting_at_least_1_day_per_week	Numeric (0 or 1). Is there one or more vomiting episodes per week? (1 = Yes).
self_induced_vomiting_present	Numeric (0 or 1). Is the vomiting self-induced? (1 = Yes). This excludes CNVS.
eating_disorder_present	Numeric (0 or 1). Is an eating disorder present? (1 = Yes). This excludes CNVS.
regurgitation_present	Numeric (0 or 1). Is regurgitation present? (1 = Yes). This excludes CNVS.
rumination_present	Numeric (0 or 1). Is rumination present? (1 = Yes). This excludes CNVS.
organic_systemic_metabolic_disease_excluded	Numeric (0 or 1). Have organic, systemic, or metabolic diseases been excluded (e.g., by upper endoscopy)? (1 = Yes).
symptom_onset_ge_6_months_ago	Numeric (0 or 1). Did symptoms start at least 6 months ago? (1 = Yes).
symptoms_active_last_3_months	Numeric (0 or 1). Have symptoms been active for the last 3 months? (1 = Yes).

Value

A list containing:

Diagnosis

"Criteria Met for Chronic Nausea Vomiting Syndrome (CNVS)" or "Criteria Not Met".

References

Stanghellini V, Chan FK, Hasler WL, et al. Gastroduodenal Disorders. Gastroenterology. 2016;150:1380-1392. doi:10.1053/j.gastro.2016.02.011

Examples

# Example 1: Criteria Met
# Nausea 1/wk (1), No vomiting (0), Exclusions clear (0), Disease excluded (1), Duration met (1,1)
rome_iv_cnvs(1, 0, 0, 0, 0, 0, 1, 1, 1)

# Example 2: Criteria Not Met (Duration too short)
# Nausea 1/wk (1), No vomiting (0), Exclusions clear (0), Disease excluded (1), Onset <6mo (0)
rome_iv_cnvs(1, 0, 0, 0, 0, 0, 1, 0, 1)

cliot documentation built on Dec. 1, 2025, 1:06 a.m.