title: [Validation of a modified version of SODA questionnaire (severity of dyspepsia assessment) adapted to Peru for evaluating evolution of symptoms severity in patients with dyspepsia].
abstract: OBJECTIVE
  To validate SODA (severity of dyspepsia assessment) questionnaire in our population for evaluating symptoms severity in patients with dyspepsia.
  
  
  METHODS
  Content and appearance validity were measured, and then a modified questionnaire was developed. A pilot test was made and reliability, construct validity and responsiveness were measured.
  
  
  RESULTS
  An adequate content and appearance validity were obtained. On the pilot test, reliability of the complete questionnaire and by components had Cronbach alpha values over 0,7. Construct validity of SODA was evaluated by correlating modified SODA results with SF-36 scores using Pearson test: -0.72 (p<0.001). When we compared results of modified SODA questionnaire and the score of a question about subjective perception of the disease using Spearman test we obtained similar results: 0.72 (p<0.001). Two means of SODA questionnaire scores, before and after treatment, were compared using Student's T test, and a significant difference was found, (p<0.001) with a drop mean of 5.70 ±5.33.
  
  
  CONCLUSIONS
  Modified SODA questionnaire meets all criteria of validity and it could be used to measure dyspepsia severity and its evolution in a Peruvian population.
authors.affiliation: Facultad de Medicina de la Universidad Peruana Cayetano Heredia, Lima, Perú. harold.benites@upch.pe
authors.forename: Eduardo
authors.initials: E
authors.lastname: Benites Goñi
authors.forename: Santiago
authors.initials: S
authors.lastname: Cabrera Cabrejos
authors.forename: Jorge
authors.initials: J
authors.lastname: Chungui Bravo
authors.forename: Ricardo
authors.initials: R
authors.lastname: Prochazka Zarate
authors.forename: Antonio
authors.initials: A
authors.lastname: Bernabe Ortiz
authors.forename: Raúl
authors.initials: R
authors.lastname: De los Ríos Senmache
authors.forename: José
authors.initials: J
authors.lastname: Pinto Valdivia
authors.forename: Jorge
authors.initials: J
authors.lastname: Huerta Mercado
authors.forename: Alejandro
authors.initials: A
authors.lastname: Piscoya Rivera
authors.forename: Alejandro
authors.initials: A
authors.lastname: Bussalleu Rivera
authors.forename: Eduar
authors.initials: E
authors.lastname: Bravo Paredes
authors.forename: Arturo
authors.initials: A
authors.lastname: Zegarra Chang
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D004415:Dyspepsia / Q000175:diagnosis*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010568:Peru; D012720:Severity of Illness Index; D011795:Surveys and Questionnaires; D063189:Symptom Assessment; D055815:Young Adult