Blood pressure reference ranges by age
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Blood Pressure Reference Ranges by Age: Key Insights
Blood Pressure Reference Ranges in Adults
Reference ranges for blood pressure (BP) in adults vary by age and gender. In a healthy Iranian adult population aged 30–69 years, the 5th to 90th percentile for systolic blood pressure (SBP) in men ranged from 95 to 148 mm Hg, and in women from 87 to 140 mm Hg. For diastolic blood pressure (DBP), the 5th to 90th percentile in men was 60 to 92 mm Hg, and in women 60 to 91 mm Hg. Men generally had higher SBP and DBP than women in this age group.
Central blood pressure (measured at the aorta) also shows age and sex differences. In Japanese adults aged 40–89 years, central systolic BP (cSBP) was higher in men (average 132 mm Hg) than women (123 mm Hg), while central pulse pressure and augmentation pressure were higher in women. These values increase with age, and age- and sex-specific percentiles are available for clinical use.
Blood Pressure Reference Ranges in Children and Adolescents
International and National Reference Tables
Blood pressure in children and adolescents is best interpreted using age-, sex-, and height-specific percentiles. International reference tables, developed from data across seven countries, show that BP values are similar between boys and girls until about age 13, after which boys tend to have higher BP. Compared to US reference values, international percentiles for systolic BP are generally lower, while diastolic BP is similar.
National studies from Germany, Portugal, Poland, China, Iran, and Korea have all developed their own reference tables, often finding differences compared to US standards. For example, Portuguese and German children had higher or lower BP percentiles than US children depending on age and sex, highlighting the importance of local reference valuesPereira2016Neuhauser2011Krzyżaniak2009+3 MORE.
Specific Age Ranges
- Children under 10 years: In Korean children aged 3–9 years, the 90th percentile for SBP at median height increased from 105 mm Hg at age 3 to 118 mm Hg at age 9 in boys, and from 105 to 116 mm Hg in girls. DBP remained relatively stable (around 69–70 mm Hg).
- Children and adolescents (6–18 years): In Iran, the 50th, 90th, 95th, and 99th percentiles for SBP and DBP were determined for boys and girls using 10-cm height intervals, providing detailed age- and height-specific charts.
- Chinese children (7–17 years): At median height, BP values for boys and girls aged 7–13 were similar, but boys had higher BP at ages 14–17. The new Chinese national reference was consistent with US values for younger children but lower than previous Chinese standards.
Clinical Use and Special Populations
- During anesthesia: Reference ranges for noninvasive BP in children during anesthesia show that mean BP increases from 33 mm Hg at birth to 67 mm Hg at 18 years, with lower cutoffs (2 SD below the mean) ranging from 17 mm Hg at birth to 47 mm Hg at 18 years.
Importance of Local and Age-Specific Reference Ranges
Studies consistently emphasize the need for local, age-, sex-, and height-specific BP reference tables for both children and adults. Differences between populations mean that using international or US-based standards may not accurately reflect the normal BP range for all groupsTayefi2018Pereira2016Neuhauser2011+5 MORE.
Conclusion
Blood pressure reference ranges vary by age, sex, and population. For adults, SBP and DBP increase with age and are generally higher in men. In children and adolescents, BP should be interpreted using age-, sex-, and height-specific percentiles, with local reference tables preferred for accuracy. These tailored reference ranges are essential for early identification of hypertension and effective health management across all age groups.
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