title: [Prevalence and mechanism of masked hypertension: the ol'mesures survey].
abstract: BACKGROUND
  Masked hypertension (MH) and uncontrolled hypertension (UCH) have both bad prognosis. The influence of measurement circumstances on MH prevalence and reproducibility are little known.
  
  
  OBJECTIVE
  To evaluate the prevalence and reproducibility of MH after excluding confusing factors [method and time of blood pressure (BP) measurement, antihypertensive treatment] by a standardization procedure.
  
  
  METHODS
  2189 hypertensive patients (61+/- 12 years, men 57%) having been treated in monotherapy by an angiotensin II receptor inhibitor for at least 8 weeks Were evaluated in a French multicenter prospective observational survey. Three BP successive office measurements were performed by the GPs during 2 visits (V) at similar times 13 +/- 9 days apart (BP: V1 149 +/- 19 / 85 +/- 11 mmHg, V2 145 +/- 19/83 +/- 11 mmHg) and home BP self-measurements (HBPM) were performed morning and evening for 3 consecutive days (HBPM morning + evening : n=18 +/- 1; 142 +/- 16/81 +/- 9 mmHg) and at the time of the visit (daytime HBPM: n=9 +/- 1; 140 +/- 16/80 +/- 10 mmHg) by the patients (Omron-705CP).
  
  
  RESULTS
  [table: see text].
  
  
  CONCLUSIONS
  the observed MH prevalence is similar to previous published studies and is independent of: treatment, BP measurement methods, measurements frequency and HBPM time but it depends on office BP values. Consequently, its reproducibility is directly dependent of the quality of office BP measurements.
authors.affiliation: HEGP, Unité d'HTA, Paris. guillaume.bobrie@egp.aphp.fr
authors.forename: G
authors.initials: G
authors.lastname: Bobrie
authors.forename: P
authors.initials: P
authors.lastname: Clerson
authors.forename: A
authors.initials: A
authors.lastname: Cuchet
authors.forename: A
authors.initials: A
authors.lastname: Mahmoudi
authors.forename: N
authors.initials: N
authors.lastname: Postel-Vinay
authors.forename: G
authors.initials: G
authors.lastname: Chatellier
mesh_terms: D047228:Angiotensin II Type 1 Receptor Blockers / Q000627:therapeutic use; D001795:Blood Pressure Determination; D005260:Female; D005602:France / Q000453:epidemiology; D006801:Humans; D006973:Hypertension / Q000175:diagnosis* / Q000188:drug therapy / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D011446:Prospective Studies
chemical_list: D047228:Angiotensin II Type 1 Receptor Blockers