PS 05-06 HOW MANY MEASUREMENTS ARE NEEDED TO ESTIMATE LONG TERM VISIT TO VISIT BLOOD PRESSURE VARIABILITY: 10-YEAR RETROSPECTIVE STUDY

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Abstract

Objective:

We aimed to determine the minimum number of BP readings required to estimate long term visit to visit blood pressure variability.

Design and Method:

We aimed to determine the minimum number of BP readings required to estimate long term visit to visit blood pressure variability.

Design and Method:

This is a retrospective study of a cohort of 1416 patients over a period of 10 year. SBP readings were captured from patient record. We captured one BP reading in each quartile of the year i.e. a maximum of 4 readings per year. Demographic data and use of antihypertensive agents were also captured. We used standard deviation (SD) as a measure of BPV. SD is calculated as

Design and Method:

JOURNAL/jhype/04.02/00004872-201609001-00398/math_398MM1/v/2017-11-10T161435Z/r/image-tiff

Design and Method:

We used Pearson correlation coefficient to calculate the correlation between variability in systolic blood pressure of different years.

Results:

The mean age of the participants at baseline was 56.5 ± 10.1 years, 34.6% were males. There is no difference between BPV reading at 3 years compared to 10 years (p = 0.221), the mean number of blood pressure reading at 3 years duration is 9.

Conclusions:

A minimum of 9 SBP readings is indicated to estimate long term visit to visit blood pressure variability in a 10-year retrospective study. The strength of the current study is that this is the first study to report on the number of SBP reading in estimating long term visit to visit blood pressure variability.

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