Each of these units included twelve clusters each containing 20-person, chosen via the same method from rural and urban areas. Fifty counties were randomly selected as the primary sampling units by using the systematic proportional-to-size probability technique. A sample of 8425 Iranian adults aged between 25 to 69 years was chosen by a multi-stage cluster random sampling scheme. Therefore, this study aimed to present blood pressure percentiles by age, sex, and BMI of a nationally representative sample population of adults.ĭata were collected by Iran’s Center for Disease Control and Prevention through the sixth round of national surveillance of Non Communicable Diseases Risk Factors in 2011. in 2008 also reported the prevalence of 23 % for adults aged 30-55 years and 50 % for subjects older than 55 years. Moreover, a meta-analysis by Haghdoost et al. reported that the prevalence of hypertension to be 25 % in a population with 5287 subjects (15-64 years), based on the seventh report of the joint national committee on prevention, detection, evaluation, and treatment of high blood pressure (JNC-7) guideline. However, they only presented the mean of systolic blood pressure (SBP) and diastolic blood pressure (DBP) and did not model BP percentile for adults' population according to age and BMI, simultaneously.
![female blood pressure chart by age female blood pressure chart by age](https://www.who.int/images/default-source/infographics/ncds/hypertension-infographic-005-page1-01.tmb-549v.jpg)
in 2007 reported age-adjusted BP for Body Mass Index (BMI) categories based on a nationally representative population of 89404 subjects. But none of them have evaluated adult populations. In recent years few studies have been conducted to develop blood pressure nomograms for age and anthropometric characteristics, simultaneously, only for children and adolescents (Neuhauser et al., 2011 Yan et al., 2013). So, it is important for each population to develop national BP percentiles for age, sex, and potential anthropometric characteristics which may influence BP levels. In addition, several studies show that overweight and obesity are associated with higher levels of blood pressure and subsequently higher prevalence of hypertension (Robinson et al., 2004 McGavock et al., 2007 Hosseini et al., 2010). However, the distribution of BP values vary based on ethnicities and races, thus standard values derived from a specific population might not be applicable to others consequently, local reference data could be a better choice to evaluate the BP measurements properly (Goonasekera and Dillon. To interpret measurements precisely, they should be compared to the standard blood pressure (BP) nomograms. Because early detection of hypertension can help control its various complications, blood pressure measurement is now regarded as an important part of routine physical examination (Somu et al., 2003). Therefore, hypertension in adults and children has drawn attention of many researchers and controlling it has become as a worldwide priority among health policies.
![female blood pressure chart by age female blood pressure chart by age](https://domf5oio6qrcr.cloudfront.net/medialibrary/4092/w0116e16207253416924.png)
In addition, most obese or overweight adults are hypertensive.Ī great deal of the worldwide burden of disease is attributed to high blood pressure, including about 13.5 % of the premature deaths and 6 % of the total global Disability Adjusted Life years (DALYs) (Lawes et al., 2008).
![female blood pressure chart by age female blood pressure chart by age](https://www.garmaonhealth.com/wp-content/uploads/2016/10/Chart_Prevalence_of_High_Blood_Pressure.jpg)
The findings of present study show that BP percentiles are steadily increased by age and BMI. Overweight and obese population, seem to fall into the category of hypertensive. SBP and DBP rose steadily with increasing age, but the rise in SBP was greater than DBP. Blood pressure increased with the rise in BMI and weight, but showed a negative correlation with height. Four separate models for systolic blood pressure (SBP) and diastolic blood pressure (DBP) of men and women were constructed for BP percentiles according to age and BMI. Linear Regression analysis was used to assess the adjusted relationship of age-sex-specific standard deviation scores of BMI, height, and weight with blood pressure. Data on demographic characteristics, anthropometric measurements, and blood pressure was recorded for each subject. Analyses were based on data collected in 2011 from 8,425 adults aged 25 to 69 years old. Since no comprehensive study has been conducted on blood pressure (BP) percentiles established upon nationally representative sample population of adults, the present study aimed to construct the blood pressure percentiles by age, sex and body mass index (BMI) of the subjects.