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Bone mineral content in Hawaiian, Asian, and Filipino children
M K Nowack1, S Brizzolara, D A Lally
1John A. Burns School of Medicine, Department of Obstetrics and Gynecology, University of Hawaii, Honolulu 96826.
Insights
Children
Area of Science:
- Pediatric bone health
- Anthropometry
- Human genetics
Background:
- Bone mineral content (BMC) is a key indicator of skeletal health.
- Ethnic variations in bone density are documented in adults, but less is known about early-life differences.
- Understanding early ethnic differences in bone mineral content is crucial for identifying potential health disparities.
Purpose of the Study:
- To investigate ethnic variations in calcaneal bone mineral content (BMC) among children.
- To determine if ethnic differences in BMC persist after accounting for age, height, and weight.
Main Methods:
- Single photon absorptiometry was used to measure calcaneal BMC in 86 children aged 6–13 years.
- Participants represented Hawaiian, Oriental, Caucasian, and Filipino ethnic groups.
- Statistical analyses included Pearson correlations, ANOVA, and ANCOVA to assess relationships and group differences.
Main Results:
- Significant positive correlations were found between BMC and age, height, and weight.
- No significant differences in age, height, or weight were observed between ethnic groups.
- ANOVA revealed significant ethnic differences in BMC, with Hawaiian children exhibiting higher BMC than Asian or Caucasian children.
- ANCOVA confirmed ethnic differences in BMC even after controlling for age, height, and weight.
Conclusions:
- Ethnic variations in bone mineral content are detectable in children as young as 6 years old.
- These findings suggest that ethnic differences in bone health can emerge early in life.
- Further research is warranted to explore the underlying genetic and environmental factors contributing to these early-life ethnic disparities in bone mineral content.
Abstract:
Os calcis bone mineral content (BMC) was measured by single photon absorptiometry in 86 children, ages 6 to 13 years from Hawaiian, Oriental, Caucasian, and Filipino ethnic groups. Pearson correlations indicated significant positive correlations between BMC and age, height, and weight. However, there were no significant differences in age, height or weight between ethnic groups. ANOVA revealed a significant effect of ethnic group on BMC with the Hawaiian group having a significantly higher BMC than the Asian or Caucasian groups. When age, height and weight were controlled for, ANCOVA still showed a significant effect of ethnicity on BMC. The current findings suggest that ethnic differences can develop early in life.