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Determinants of blood pressure in Sowetan infants
R E Smith1, A Kok, A D Rothberg
1Department of Paediatrics and Child Health, University of the Witwatersrand, Johannesburg.
Insights
Infant blood pressure in Sowetan babies is influenced by weight, feeding, and formula. Maternal blood pressure showed a small correlation, leaving most factors unexplained in this Birth-to-Ten cohort study.
Area of Science:
- Pediatrics
- Public Health
- Cardiovascular Health
Background:
- Infant blood pressure is a critical health indicator.
- Understanding factors influencing infant blood pressure is essential for early intervention.
- The Birth-to-Ten (BTT) cohort provides a valuable population for studying developmental health in Sowetan infants.
Purpose of the Study:
- To investigate the impact of various factors on the systolic blood pressure of Sowetan infants at one year of age.
- To explore the relationship between infant feeding practices, anthropometric measurements, and maternal blood pressure with infant blood pressure.
- To identify key determinants of blood pressure variance in early childhood.
Main Methods:
- Systolic blood pressure measurements were taken from 792 infants in the Birth-to-Ten cohort at one year of age.
- Data on anthropometric indices (weight, upper arm circumference, length) and feeding practices (formula start age, volume, salt addition) were collected.
- Correlation analysis was performed to assess the relationship between infant blood pressure, maternal blood pressure, and other variables.
Main Results:
- Weight, upper arm circumference, formula feeding age, length, and volume significantly explained 29.3% of systolic blood pressure variance.
- The amount of salt added to the infant's diet approached statistical significance as a contributing factor.
- Maternal blood pressure accounted for only an additional 2% of the variance in infant blood pressure.
Conclusions:
- While several factors influence infant blood pressure, a significant portion (approximately 70%) of the variance remains unexplained.
- Current data limits firm recommendations on formula feeding and salt addition due to the limited follow-up period.
- Further longitudinal research is needed to fully elucidate the determinants of blood pressure in Sowetan infants.
Abstract:
A study of the effect of different variables on the blood pressure of Sowetan infants was undertaken with the Birth-to-Ten (BTT) cohort as the study population. Variables studied at 1 year included anthropometric indices, aspects of feeding practices and relationship to maternal blood pressure. Systolic blood pressure was recorded in 792 infants at 1 year; 29,3% of the variance was determined by weight, upper arm circumference, age at which formula feeds were started, length and volume of formula feeds (in order of significance). Amount of salt added to diet approached statistical significance. Data available for 353 of the 752 infants showed a correlation between the infants' and the mothers' blood pressure. The maternal blood pressure only accounted for an additional 2% of the variance; approximately 70% of blood pressure variance is therefore still unexplained. Firm recommendations with regard to use of formula feeds and the addition of salt to infants' diet are difficult to make on the basis of this limited follow-up.