Development of blood
pressure percentile tables for
children from African and
Caribbean backgrounds living
in the UKEva A-Attah (MB BS, MPH)
Institute for Health Research & Policy
Outline For Presentation
Aims & Objectives
Summary of findings
– World #1 cause of
systolic and diastolic
High prevalence of
Hypertension in UK.
-32% men & 30%
Effects of High BP
High BP in Caribbean & African Children
Higher prevalence of
hypertension in Caribbean &
Africans than Caucasians
Obesity predisposes to high
BP in children.
Association between adult
and childhood BP established.
Childhood BP Monitoring
BP Monitoring - Best way to
Parameters for BP
monitoring in children (age,
gender & height)
Height impt to avoid
CDC-US has developed BP
tables for girls and boys.
-To develop BP percentile tables for African
and Caribbean children for easy monitoring of
-To identify African and Caribbean children
aged 5-18yrs with abnormally high BP.
-To ascertain the BP levels of African and
Caribbean children for clinical and research
Subjects and methods
Raw data was obtained from the Health Survey for
England 1991 to 2008.
The data was sorted to obtain a total of 900 African and
Caribbean children aged 5 – 18 years.
The Normal Distribution of the data was verified using
LMS method which is based on the British 1990
Diastolic and systolic blood pressures as well as height,
weight and body mass index of the children were
retrieved for analysis using SPSS version 17. Out of the
total number of children, 99% had valid parameters
which could be analysed.
The analysis of the data entailed the sorting out
of the data into various age groups and gender.
For each age group and gender, the 50th, 75th,
90th and 95th height percentile were determined
Then for each height percentile of a particular
age group and gender, the respective 50th,
90th, 95th and 99th percentile of both the
systolic and diastolic pressures determined.
The results were then tabulated.
Summary of findings
BP increased with age.
No significant difference with gender.
BP did not consistently increase with height
-compared to US data.
Body weight is the major factor influencing
BP percentiles tables & charts for African and
Caribbean children can be produced.
Potential to develop BP reference tables
based on gender and age.
Sample size was too small to detect variation
in BP in the African and Caribbean children.
The persisting high rates of cardiovascular
diseases and hypertension epidemic calls for
continuing research to focus attention on
blood pressure tracking from childhood to