The self-measurement of blood pressure: an experiment with office workers at their place of work.

One hundred office workers measured their own blood pressure at their place of work twice a day for 3 weeks. No technical difficulties or adverse psychological reactions were observed. Of 85 answers to a questionnaire, 64 indicated a preference for self-measurement to measurements made by a physician or nurse. Variations of blood pressure showed no relationship to the actual pressure. A preference for the digits 0 and 5 was observed.