Validation of Short-form Nepean Dyspepsia Index in Iranian Patients with Functional Dyspepsia

Studying the validity and reliability of short-form )SF(-Nepean Dyspepsia Index )NDI( in patients with functional dyspepsia )FD(.
After translating to Persian, the NDI-10 was filled out by 210 patients with FD, whose disease had been diagnosed by a gastroenterologist based on Rome 3 criteria, who admitted to Gastroenterology Clinic of Afzalipour Hospital in 2015. The reliability of the questionnaire was studied by test-retest and Cronbach’s alpha coefficient. The validity of the questionnaire was evaluated through content-validity and criterion-validity.
Through analyzing the results of test-retest of the questionnaire, the Pearson coefficient was obtained as 83%, which proves the reliability of the questionnaire. Criterion-validity with the correlation coefficient of 0.56 and content-validity both prove the adequacy of questionnaire for measuring the quality of life in patients with FD.
Generally, Persian translation of this questionnaire has acceptable validity and reliability for measuring the quality of life in patients with FD.