Related Experiment Videos
Intrauterine growth retardation and blood pressure at age seven and eighteen
S Williams1, I M St George, P A Silva
1Preventive and Social Medicine Department, Otago Medical School, Dunedin, New Zealand.
Insights
Intrauterine growth retardation may influence childhood blood pressure, particularly in infants with low ponderal index. However, these associations were less pronounced by early adulthood.
Area of Science:
- Pediatrics
- Cardiovascular Health
- Developmental Biology
Background:
- Intrauterine growth retardation (IUGR) is a significant concern impacting long-term health.
- Previous studies suggest a link between birth size and later cardiovascular outcomes.
- Understanding early life factors influencing blood pressure is crucial for preventative health strategies.
Purpose of the Study:
- To investigate the association between intrauterine growth delay and blood pressure levels in middle childhood and early adulthood.
- To explore the relationship between specific indicators of fetal growth (ponderal index, placental weight) and subsequent blood pressure.
- To determine if early life growth patterns predict blood pressure trajectories over time.
Main Methods:
- Longitudinal study examining blood pressure at ages 7 and 18.
- Comparison of blood pressure between children with and without intrauterine growth delay.
- Analysis of blood pressure differences based on ponderal index and placental weight in infants with IUGR.
Main Results:
- At age 7, children with intrauterine growth delay showed slightly higher systolic blood pressure (0.9 mmHg) but no significant difference in diastolic blood pressure compared to normal children.
- Infants with IUGR and a low ponderal index had significantly higher systolic (4.4 mmHg) and diastolic (3.8 mmHg) blood pressure at age 7 compared to those with an appropriate ponderal index.
- These blood pressure differences diminished by age 18.
Conclusions:
- The findings suggest a weak association between intrauterine growth factors and blood pressure in later life.
- Infant ponderal index appears to be a more sensitive indicator of later blood pressure differences than simple growth delay.
- Further research is needed to confirm these associations and elucidate underlying mechanisms.
Abstract:
The association between intrauterine growth retardation and blood pressure in middle childhood and early adulthood was examined. At age 7, after adjusting for sex and weight, the differences between normal children and those who had experienced intrauterine growth delay were 0.9 mmHg (95% CI -0.1 to 2.2) for systolic and 0 mmHg (-1.7 to 2.0) for diastolic blood pressure respectively. The differences between the blood pressures of intrauterine growth retarded infants with an appropriate ponderal index and those with a low ponderal index were 4.4 mmHg (-0.9 to 7.9) for systolic, and 3.8 mmHg (0.2 to 7.3) for diastolic blood pressure respectively. At age 18 the differences were much less pronounced. The association between blood pressure and the placental weight was also examined. The evidence from this sample lends weak support to the findings of other studies which suggest that there is an association between factors occurring before or around the time of birth and blood pressure in later life.