Hypertension management and stroke recurrence in a community (Rochester, Minnesota, 1950-1979).

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Abstract
The purposes of this study were to determine the trend in stroke recurrence over time and the effect of the prestroke blood pressure and management of hypertension on stroke recurrence in 1,680 incidence cases of stroke in residents of Rochester, Minnesota. Recurrent, primarily ischemic, stroke occurred in 267 cases. Stroke recurrence rates did not change during the 30-year period 1950-1979, in contrast to the decline in initial stroke incidence rates during this time. The overall stroke recurrence rates were less than 5%/yr, with cumulative rates of 5.7%, 19.3%, and 28.8% at 1, 5, and 10 years, respectively. Neither level of blood pressure before the first stroke nor management of hypertension had any apparent effect on stroke recurrence rates throughout the follow-up.