White-coat hypertension and normotension in the League of Hypertension of the Hospital das Clínicas, FMUSP: prevalence, clinical and demographic characteristics

• Published in: Arquivos brasileiros de cardiologia Vol. 80; no. 2; pp. 117 - 126
• Main Authors: Segre, Carlos A, Ueno, Rubens K, Warde, Karim R J, Accorsi, Tarso A D, Miname, Márcio H, Chi, Chang K, Pierin, Angela M G, Mion Júnior, Décimo
• Format: Journal Article
• Language: English; Portuguese
• Published: Brazil 01.02.2003
• Subjects: Blood Pressure; Blood Pressure Determination - methods; Brazil - epidemiology; Female; Humans; Hypertension - diagnosis; Hypertension - drug therapy; Hypertension - epidemiology; Male; Middle Aged; Multivariate Analysis; Office Visits; Prevalence; Retrospective Studies; Brazil
• ISSN: 0066-782X

To assess the prevalence of white-coat normortension, white-coat hypertension, and white-coat effect. We assessed 670 medical records of patients from the League of Hypertension of the Hospital das Clínicas of the Medical School of the University of S o Paulo. White-coat hypertension (blood pressure at the medical office: mean of 3 measurements with the oscillometric device > or = 140 or > or = 90 mmHg, or both, and ambulatory blood pressure monitoring mean during wakefulness < 135/85) and white-coat normotension (office blood pressure < 140/90 and blood pressure during wakefulness on ambulatory blood pressure monitoring > or = 135/85) were analyzed in 183 patients taking no medication. The white-coat effect (difference between office and ambulatory blood pressure > 20 mmHg for systolic and 10 mmHg for diastolic) was analyzed in 487 patients on treatment, 374 of whom underwent multivariate analysis to identify the variables that better explain the white-coat effect. Prevalence of white-coat normotension was 12%, prevalence of white-coat hypertension was 20%, and prevalence of the white-coat effect was 27%. A significant correlation (p<0.05) was observed between white-coat hypertension and familial history of hypertension, and between the white-coat effect and sex, severity of the office diastolic blood pressure, and thickness of left ventricular posterior wall. White-coat hypertension, white-coat normotension, and white-coat effect should be considered in the diagnosis of hypertension.