The Gas and Bloating Diary Instrument (GABDI) is a list of patient-reported symptoms
that are used for the evaluation of abdominal problems associated with gas and bloating. This problem
affects 15-20% of the US population. GABDI comprises of 11 commonly experienced symptoms, and
each one is assessed for its intensity, frequency, and duration. Because the incidence and nature of
these symptoms vary day to day, and it is often difficult to accurately remember them, there is a
significant recall bias. Hence, it is important to prospectively, accurately, and in a timely manner
document and assess these patient-reported abdominal symptoms for use in clinical trials, and
assessment of these patients.
Satish Rao MD & Neurogut Inc.
To assess the presence of and severity of patient-reported abdominal and bowel symptoms related to
the occurrence of gas and bloating, for use in clinical trials, and the assessment of patients with gas and
Gastrointestinal and Digestive System Diseases
Pathological conditions, Signs and Symptoms
Gas and bloating
Abdominal discomfort and pain
Constipation and diarrhea
Small Intestinal Bacterial Overgrowth (SIBO) or Fungal Overgrowth (SIFO)
Type of Clinical Outcome Assessment (COA)
Patient Reported Outcome (PRO) assessment
English for the USA
Bibliographic reference for the original questionnaire:
Choi YK, Kraft N, Zimmerman B, Jackson M, Rao SSC. Fructose intolerance in IBS and Utility of Fructose-
restricted diet. J Clin Gastroenterol 2008; 42:233-238.