The goal of the SHEAF study is to determine whether self blood pressure measurement (SBPM) has a better cardiovascular prognostic value than office blood pressure (OBP) among French elderly (> or = 60 y) hypertensive patients (pts) followed-up by general practitioners. Baseline SBPM was performed over a 4-day period: every day a series of 3 consecutive measurements was requested in the morning (8:00 am) and in the evening (8:00 pm), using a validated device OMRON 705 CP. Measurements performed out of predefined morning and evening time (outside the 4:00-12:00 am range or the 4:00-12:00 pm range) were discarded as well as aberrant values. Pts were included in the study only if they exhibited at least 15 valid measurements with at least 6 in the morning and 6 in the evening. 5,649 pts were selected. 186 pts were excluded for age < 60 years. Thus SBPM analysis was performed for 5,463 pts: 2,687 men (49%) and 2,776 women (51%) aged 70 +/- 7 years. Only 252 pts (5%) were excluded for non valid SBPM (207 pts < 15 measurements, 106 pts < 6 measurements in the morning and 205 pts < 6 measurements in the evening). 5,211 pts (95%) with valid SBPM were included. The distribution of pts according to the number of measurements performed is the following: [table: see text] The number of measurements performed in the morning is highly related to the number of measurements performed in the evening. None of the following variables is significantly associated with the poor compliance of measurement protocol: age, gender, CV history, CV risk factors, hypertension duration. In a large cohort of elderly hypertensive living in the community, SBPM is easily performed both in the morning and in the evening by most of the pts. If the SHEAF study demonstrates the prognostic value of SBPM, this would provide the basis for the use of this measurement method by a majority of elderly hypertensives.