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Int J Cardiol. 1994 Sep;46(2):151-7.

Comparison of ambulatory blood pressure monitoring and conventional office measurement in the workers of a chemical company.

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Clinica Medica I, University of Florence, Italy.


The aim of the present study was to define the different prevalence of hypertension when conventional office measurement and ambulatory monitoring are performed in a population of unselected workers. All the workers of a Florentine chemical company were invited to participate in the study. Enrolled subjects underwent blood pressure measurement using a conventional sphygmomanometer and ambulatory blood pressure monitoring. Of 191 workers, 145 agreed to participate in the study (76%). Six of the 145 were excluded from further analysis because they were undergoing antihypertensive therapy. Confidence limits for ambulatory monitoring were defined at 95% on normotensive workers. Thirty-five (25%) workers were found to be hypertensive according to World Health Organization parameters (diastolic pressure > 90 mmHg) but only 14 of the 35 had higher 24-h diastolic ambulatory blood pressure than the 95% confidence limits of controls.

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