title: Effect of alerts for drug dosage adjustment in inpatients with renal insufficiency.
abstract: OBJECTIVE
  Medication errors constitute a major problem in all hospitals. Between 20% and 46% of prescriptions requiring dosage adjustments based on renal function are inappropriate. This study aimed to determine whether implementing alerts at the time of ordering medication integrated into the computerized physician order entry decreases the proportion of inappropriate prescriptions based on the renal function of inpatients.
  
  
  METHODS
  Six alternating 2-month control and intervention periods were conducted between August 2006 and August 2007 in two medical departments of a teaching hospital in France. A total of 603 patients and 38 physicians were included. During the intervention periods, alerts were triggered if a patient with renal impairment was prescribed one of the 24 targeted drugs that required adjustment according to estimated glomerular filtration rate (eGFR).
  
  
  METHODS
  The main outcome measure was the proportion of inappropriate first prescriptions, according to recommendation.
  
  
  RESULTS
  A total of 1,122 alerts were triggered. The rate of inappropriate first prescriptions did not differ significantly between intervention and control periods (19.9% vs. 21.3%; p=0.63). The effect of intervention differed significantly between residents and senior physicians (p=0.03). Residents tended to make fewer errors in intervention versus control periods (Odds ratio 0.69; 95% confidence interval 0.41 to 1.15), whereas senior physicians tended to make more inappropriate prescriptions in intervention periods (odds ratio 1.88; 95% confidence interval 0.91 to 3.89).
  
  
  CONCLUSIONS
  Alert activation was not followed by a significant decrease in inappropriate prescriptions in our study. Thus, it is still necessary to evaluate the impact of these systems if newly implemented in other settings thanks to studies also designed to watch for possible unanticipated effects of decision supports and their underlying causes.
authors.affiliation: Assistance Publique des Hôpitaux de Paris Georges Pompidou European Hospital, Medical Informatics and Public Health Department, and Paris Descartes University, Paris, France.
authors.forename: Elodie
authors.initials: E
authors.lastname: Sellier
authors.forename: Isabelle
authors.initials: I
authors.lastname: Colombet
authors.forename: Brigitte
authors.initials: B
authors.lastname: Sabatier
authors.forename: Gaelle
authors.initials: G
authors.lastname: Breton
authors.forename: Julie
authors.initials: J
authors.lastname: Nies
authors.forename: Eric
authors.initials: E
authors.lastname: Zapletal
authors.forename: Jean-Benoit
authors.initials: JB
authors.lastname: Arlet
authors.forename: Dominique
authors.initials: D
authors.lastname: Somme
authors.forename: Pierre
authors.initials: P
authors.lastname: Durieux
mesh_terms: D011307:Drug Prescriptions; D004360:Drug Therapy, Computer-Assisted; D005260:Female; D005602:France; D006784:Hospitals, Teaching / Q000458:organization & administration; D006801:Humans; D008297:Male; D050316:Medical Order Entry Systems; D008508:Medication Errors / Q000517:prevention & control*; D008510:Medication Systems, Hospital; D016017:Odds Ratio; D004364:Pharmaceutical Preparations / Q000008:administration & dosage*; D017010:Reminder Systems; D051437:Renal Insufficiency / Q000188:drug therapy*; D018511:Systems Integration
chemical_list: D004364:Pharmaceutical Preparations