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¶ … blood pressure is related with stroke occurrence. Links of amplified visit-to-visit variability in blood pressure and the connection between inconsistency and all-cause death were observed during the study, utilizing information on adults from the U.S. older than 20 years of age from the Third National Health and Nutrition Examination Survey. The number taken from the survey was 956. From that number, three successive blood pressure readings, taken from among a duration of three isolated study visits during the time range of 1988- 1994 were recorded.
The authors used standard deviation and coefficient of variation, to understand and define the mean derived from the second and third visits and their subsequent measurements. Evaluation of death was performed all the way until December 31, 2006 with the number of deaths labeled 240. The median follow up was fourteen years. 7.7 mm Hg was the determined mean of the standard deviation when it came to the measurements of systolic blood pressure spanning the multiple visits. History of previous heart problems such as myocardial infraction, gender, age, and so forth were taken into account in the study. What was found related to higher standard deviation in systolic blood pressure along with pulse pressure; they saw the connection with patients...
Similar results were obtained with assessment of coefficient of variation. Ultimately, the study found, visit-to-visit changeability for diastolic blood pressure was not connected with death. However, the results show greater intensities of short-term visit-to-visit inconsistency in systolic blood pressure were related to bigger all-cause death.
When defining a measure of central tendency, it is regarded as a solitary value that endeavors to designate a set of data by recognizing the principal point within that set of figures. Therefore, measures of central tendency are occasionally named measures of central location and are also termed summary statistics. The mean or the average is most probably the measure of central tendency most seen in studies including the mode and the median. The study calculated the mean. "(n=956) versus excluded (n=1143) in the current analyses had similar mean systolic blood pressure levels during the in-home visit (127.7 mm Hg and 127.5 mm Hg, respectively; P=0.804) and during the first visit to the mobile examination center (125.3 mm Hg and 123.6 mm Hg, respectively; P=0.061)" (Muntner et al., 2011, pp. 160-166).
The study did use an appropriate…
References
Israeli, N. (1930). Variability and central tendency in aesthetic judgments.. Journal of Applied Psychology, 14(2), 137-149.
Muntner, P., Shimbo, D., Tonelli, M., Reynolds, K., Arnett, D.K., & Oparil, S. (2011). The Relationship Between Visit-to-Visit Variability in Systolic Blood Pressure and All-Cause Mortality in the General Population: Findings From NHANES III, 1988 to 1994. Hypertension, 57(2), 160-166. Retrieved June 21, 2014, from http://hyper.ahajournals.org/content/57/2/160.full
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