Borhani, Nemat O.; Hechter, H. H.
December 1964
Angiology;Dec1964, Vol. 15 Issue 12, p545
Academic Journal
1. The results of a longitudinal study of blood pressure among San Francisco longshoremen examined in 1951 and 1961 are presented. 2. Grouping the individuals according to their 1951 systolic and diastotic blood pressure readings, and associating them with mortality from coronary heart disease and from all causes, we found that the higher the systolic or diastolic blood pressure in 1951, the greater was the risk of mortality during the ensuing 10 years. 3. Mean and median blood pressure in San Francisco longshoremen increased with age and so did the variance. Using the median systolic blood pressure as a measure of central tendency and the 20 and 80 percentile as an indication of variability, we found that systolic blood pressure changed very little between ages 20 and 40, rose steadily until age 60, and ten leveled off. 4. Cigarette smokers, by and large, have slightly lower blood pressure than nonsmokers. 5. The frequency distribution of systolic and diastolic blood pressure of those longshoreman one or both of whose parents died in middle age (40 to 64) was not different from the frequency distribution of blood pressure of those longshoremen whose parents lived to old age 65 and over). 6. The frequency distributions of the increment of blood pressure in a group of San Francisco longshoremen observed over a 10-year period were unimodal and symmetric. Furthermore, changes in blood pressure occurred in both positive and negative directions.


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