title: [Analysis of arterial pressure variability among individuals with white coat hypertension and essential arterial hypertension using blood pressure ambulatory monitoring].
abstract: OBJECTIVE
  To compare patients with "white coat" hypertension (WCH) and essential hypertension for variability in blood pressure (BP) taken in the clinic.
  
  
  METHODS
  Crossover study.
  
  
  METHODS
  La Orden Health Centre, Huelva.
  
  
  METHODS
  126 people with light-to-moderate hypertension, de novo or not, being monitored but not treated by drugs. Two groups were formed: WCH defined by mean daily systolic and distolic pressures below 135 and 85 mmHg, and hypertension when the BP was over 140 and/or 90 mmHg.
  
  
  RESULTS
  BP was taken in the clinic in two periods: by day (7 a.m. to midnight) and at night (00.01 to 06.59), with readings every 15 and 30 minutes, respectively. Variability was compared by analysing: a) variability indices (VI), and b) coefficients of variation (CV) in BP. A regression test and multiple correlation was used. Both groups (hypertension and WCH) contained 63 people (average age: 53.4 +/- 10 and 50 +/- 10). No significant differences between the two groups in the VI were observed, except greater variability in the VI of the nocturnal systolic pressure of the hypertension group. The CV was higher in the WCH group for all pressures, with differences for 24-hour and day-time systolic pressure. The VI of systolic pressure correlated significantly with its overall clinical systolic pressure in the 24-hour period, with the day and night-time readings and with age in the day-time period.
  
  
  CONCLUSIONS
  Variability in the blood pressure of people with essential hypertension and WCH does not differ. Variability in systolic pressure shows positive correlation with clinical systolic pressure and, to a lesser extent, with age.
authors.affiliation: Centro de Salud La Orden, Huelva.
authors.forename: E
authors.initials: E
authors.lastname: Márquez Contreras
authors.forename: J J
authors.initials: JJ
authors.lastname: Casado Martínez
authors.forename: J P
authors.initials: JP
authors.lastname: Moreno García
authors.forename: E
authors.initials: E
authors.lastname: Cores Prieto
authors.forename: C
authors.initials: C
authors.lastname: Baquero Ramos
authors.forename: M
authors.initials: M
authors.lastname: López de Andrés
authors.forename: J L
authors.initials: JL
authors.lastname: Martín de Pablos
mesh_terms: D018660:Blood Pressure Monitoring, Ambulatory; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D006973:Hypertension / Q000175:diagnosis* / Q000523:psychology; D008297:Male; D008875:Middle Aged
vernacular_title: Análisis de la variabilidad de la presión arterial entre individuos con hipertensión de bata blanca e hipertensión arterial esencial mediante monitorización ambulatoria de la presión arterial.