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A longitudinal study of blood pressure in childhood
Insights
Blood pressure stratification begins in childhood. Children’s blood pressure readings show significant familial correlation and stability over time, indicating early patterns.
Area of Science:
- Pediatrics
- Cardiovascular Health
- Human Genetics
Background:
- Childhood blood pressure is a critical indicator of cardiovascular health.
- Understanding familial aggregation and tracking of blood pressure is essential for early intervention.
- Previous studies indicated familial resemblance in blood pressure, but longitudinal data in childhood is crucial.
Purpose of the Study:
- To investigate the familial aggregation and longitudinal tracking of blood pressure in children.
- To determine if blood pressure stratification is detectable in childhood.
- To analyze the relationship between initial and follow-up blood pressure readings in a pediatric cohort.
Main Methods:
- Longitudinal study of 609 children aged 6-18 from 163 families, with 549 re-evaluated after 4 years.
- Blood pressure measurements were adjusted for age and sex, expressed in standard deviation units (SDU).
- Analysis of variance and regression analyses were used to assess within-family variance and tracking of blood pressure.
Main Results:
- Variance in blood pressure within families was significantly less than among the general child population (p < .001).
- Significant positive correlations were found between initial and follow-up readings for both systolic (0.24, p < .001) and diastolic (0.14, p = .001) pressures.
- Children with high initial systolic scores ( > 1 SDU) were likely to maintain high scores, and those with low initial scores ( < 1 SDU) were likely to maintain low scores at follow-up.
Conclusions:
- Blood pressure stratification, influenced by familial factors, is established and detectable during childhood.
- These findings highlight the importance of early blood pressure monitoring and familial assessment in pediatric care.
- The data suggest that childhood blood pressure patterns have a degree of persistence, underscoring the need for early identification of at-risk individuals.
Abstract:
Blood pressures were taken in 609 children aged 6-18 in 163 families, 549 of whom had been studied 4 years earlier. Age and sex adjusted scores were expressed in standard deviation units (SDU). Analysis of variance again revealed the variance of blood pressures within families to be significantly less than among all children in this age group (p is less than 001. There was a significant positive relation between the follow-up and initial readings (regression coefficients: 0.24,p is less than .001 for systolic and 0.14,p = .001 for diastolic pressures). Of 88 children with initial systolic scores greater than 1 SDU above the mean, 65 percent had positive scores at follow-up, and 57 of 81 (70 percent) children with initial systolic scores less than 1 SDU below the mean had negative scores at follow up. These data suggest that stratification of blood pressures within peer groups begins and is detectable in childhood.