title: From registry data collection to international comparisons: examples of haemodialysis duration and frequency.
abstract: BACKGROUND
  The purpose of this study was to investigate haemodialysis (HD) dose practice patterns in different European countries in the light of the European Best Practice Guidelines (EBPG) and to study the associations of patient characteristics and country with weekly dialysis duration.
  
  
  METHODS
  Renal registries in Europe were asked to contribute to the study with individual patient data on weekly HD duration, number of HD sessions a week and last measured Kt/V. Additional items were age, sex, date of first renal replacement therapy (RRT), dry weight, height, HD modality, HD technique, diabetes status and vascular access type. Multivariate logistic regression was used to study the probability of receiving HD for <12 h per week.
  
  
  RESULTS
  Seven registries contributed data on 26 136 patients on HD on 31 December 2005. Eighty-three percent of the patients received HD for at least 12 h per week as recommended by the EBPG (range 49.0-97.3% across countries). Multivariate analysis showed significant differences across countries concerning the risk of receiving <12 h. Other risk factors included age (older), sex (female), BMI (low) and duration of RRT (shorter). Diabetes was associated with longer total HD duration.
  
  
  CONCLUSIONS
  This study shows a great international variability in weekly HD duration and some discrepancies between current practices and the EBPG. It also points out the difficulty of obtaining and comparing Kt/V values under current registry practices.
authors.affiliation: French ESRD Registry REIN, Agence de la biomedecine, Saint-Denis La Plaine, France. cecile.couchoud@biomedecine.fr
authors.forename: Cécile
authors.initials: C
authors.lastname: Couchoud
authors.forename: Jeroen
authors.initials: J
authors.lastname: Kooman
authors.forename: Patrik
authors.initials: P
authors.lastname: Finne
authors.forename: Torbjørn
authors.initials: T
authors.lastname: Leivestad
authors.forename: Olivera
authors.initials: O
authors.lastname: Stojceva-Taneva
authors.forename: Jadranka Buturovic
authors.initials: JB
authors.lastname: Ponikvar
authors.forename: Frederic
authors.initials: F
authors.lastname: Collart
authors.forename: Reinhard
authors.initials: R
authors.lastname: Kramar
authors.forename: Angel
authors.initials: A
authors.lastname: de Francisco
authors.forename: Kitty J
authors.initials: KJ
authors.lastname: Jager
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003625:Data Collection; D005060:Europe; D005260:Female; D006801:Humans; D038622:Internationality; D008297:Male; D008875:Middle Aged; D017410:Practice Guidelines as Topic; D012042:Registries; D006435:Renal Dialysis / Q000379:methods* / Q000706:statistics & numerical data*; D013997:Time Factors; D055815:Young Adult