title: [Prevalence and clinical characteristics of the IBS subtypes according to the Rome III criteria in patients from a clinical, multicentric trial. A report from the Mexican IBS Working Group].
abstract: BACKGROUND
  In Mexico the prevalence of irritable bowel síndrome (IBS) using Rome II criteria varies between 16 and 35%.
  
  
  OBJECTIVE
  To analyze the relative frequency of the IBS subtypes according to the Rome III criteria.
  
  
  METHODS
  A multicentric study in 1677 IBS-Rome III patients that consulted private medical clinics. They all answered a structured interview by their physicians to determine the IBS subtype and to evaluate their symptoms intensity (Likert Scales). Patients self-evaluated their symptoms as well by using 10 cm visual analog scales for each one.
  
  
  RESULTS
  Women represented 76.8% of the patients for a F:M ratio of 3.3:1. The relative frequencies of the IBS subtypes were IBS-M: 48.4%, IBS-E: 43.0%, IBS-D: 5.6% and IBS-U: 2.8% with females predominating among all. However, IBS-D included 1.7 to 2.4 times more men than any of the other subtypes. The IBS-M reported a higher frequency and intensity of halitosis and vomiting and a higher intensity of burping; while those with IBS-E reported a higher frequency and intensity of straining and the IBS-D more urgency for a bowel movement, fecal incontinence and mucous in the stools.
  
  
  CONCLUSIONS
  In IBS-Rome III patients in Mexico, IBS-M is the most common subtype and is more commonly associated with dyspeptic symptoms while the IBS-E reported more outlet symptoms and the IBS-D fecal incontinence. There is a higher female predominance amongst all, however men are more likely to be in IBS-D.
authors.affiliation: Laboratorio de Hígado, Páncreas y Motilidad (HIPAM). Departamento de Medicina Experimental, Facultad de Medicina, Universidad nacional Autónoma de México (UNAM).
authors.forename: M
authors.initials: M
authors.lastname: Schmulson
authors.forename: J A
authors.initials: JA
authors.lastname: Vargas
authors.forename: A
authors.initials: A
authors.lastname: López-Colombo
authors.forename: J M
authors.initials: JM
authors.lastname: Remes-Troche
authors.forename: J C
authors.initials: JC
authors.lastname: López-Alvarenga
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D043183:Irritable Bowel Syndrome / Q000145:classification / Q000175:diagnosis* / Q000453:epidemiology*; D008297:Male; D008800:Mexico; D015995:Prevalence