title: Reproducibility of ambulatory cutaneous electrogastrography in healthy volunteers.
abstract: OBJECTIVE
  Cutaneous electrogastrography (cEGG) is a technique used for recording gastric electrical activity through electrodes placed on the abdominal skin. Given its increasing use for different pathologies, we decided to study its reliability (or reproducibility), that had never been appropriately assessed before.
  
  
  METHODS
  Ambulatory cutaneous electrogastrogram was recorded after US location of the gastric antrum in 26 healthy volunteers with ages ranging from 20 to 60 years. cEGG was recorded during 60 minutes in fasting state and 60 minutes after a standard meal and it was repeated in a different day but under the same conditions.
  
  
  RESULTS
  ANOVA analysis showed significant individual differences regarding dominant frequency (DF) (p = 0.19) and power ratio (PR) (p = 0.11), and before and after the meal, except for DF (p = 0.12), dominant power (DP) (p = 0.59) and bradygastria (p = 0.09). No significant differences were found related to the day of the recording. The intra-observer agreement index showed a good agreement in the DF and the percentage of normogastria (0.91).
  
  
  CONCLUSIONS
  Currently, DF and normogastria percentage are the most reliable variables for the non-invasive study of gastric electric activity.
authors.affiliation: Servicio de Aparato Digestivo, Hospital Clínico Universitario San Carlos, Madrid, Spain. yrealm@medymet.com
authors.forename: Y
authors.initials: Y
authors.lastname: Real Martínez
authors.forename: A
authors.initials: A
authors.lastname: Ruiz de León
authors.forename: M
authors.initials: M
authors.lastname: Díaz-Rubio
mesh_terms: D000328:Adult; D004568:Electrodiagnosis; D004594:Electrophysiology; D005260:Female; D006801:Humans; D008297:Male; D018670:Monitoring, Ambulatory; D015203:Reproducibility of Results; D012879:Skin Physiological Phenomena; D013270:Stomach / Q000502:physiology*