title: ESCAPE ancillary blood pressure measurement study 2: changes in end-digit preference after 2 years of a cluster randomized trial.
abstract: OBJECTIVE
  The aim of the ESCAPE AMPA 2 trial was to describe the evolution of end-digit preference (EDP) practices in primary care after 2 years of trial.
  
  
  METHODS
  A descriptive analysis of the EDP in the intervention group (IG) and in the electronic control group (ECG) of the ESCAPE trial and a comparative analysis of EDP changes in blood pressure (BP) measures of both groups were carried out between baseline and 2 years. In the ESCAPE trial, physicians in the IG were new users of electronic devices provided in the trial to measure their patients' BP and physicians in the ECG were former users of electronic devices. Hierarchical mixed-effects models were used for statistical analysis in a pragmatic cluster randomized-controlled trial.
  
  
  RESULTS
  After 2 years, the proportion of BP measures ending with a 0 or a 5 was significantly higher in the ECG than in the IG (50.4 vs. 33.4%, P<0.0001). There was no significant change in EDP tendency between baseline and the end of the trial in the ECG (65.6-56.7%, P=0.39) and in the IG (29.6-38.2%, P=0.07), with a between-groups P value of 0.11. Over 2 years, there was no significant change in systematic EDP in the ECG (18.8-20.0%, P=0.29) and in the IG (4.8-10.6%, P=0.01), with a between-groups P value of 0.17.
  
  
  CONCLUSIONS
  EDP is not eliminated by electronic devices and tends to increase with time for new users.
authors.affiliation: aDepartment of General Practice, François-Rabelais University, PRES Centre-Val de Loire University, Tours bBiostatistics Department, CNRS, UMR 558, Lyon-1 Medical University, Lyon, France.
authors.forename: Clarisse
authors.initials: C
authors.lastname: Dibao-Dina
authors.forename: Jean-Pierre
authors.initials: JP
authors.lastname: Lebeau
authors.forename: Dominique
authors.initials: D
authors.lastname: Huas
authors.forename: Florent
authors.initials: F
authors.lastname: Boutitie
authors.forename: Denis
authors.initials: D
authors.lastname: Pouchain
mesh_terms: D001794:Blood Pressure; D001795:Blood Pressure Determination / Q000379:methods*; D016000:Cluster Analysis; D005260:Female; D006801:Humans; D006973:Hypertension / Q000175:diagnosis; D008297:Male; D015233:Models, Statistical; D011320:Primary Health Care