Relative spinal bone mineral density measurements on 261 North American adolescents. Each value is the difference in spnbmd taken on two consecutive visits, divided by the average. The age is the average age over the two visits.
- idnum: identifies the child, and hence the repeat measurements
age: average age of child when measurements were taken
- gender: male or female
spnbmd: Relative Spinal bone mineral density measurement
If you use these data in a publication, please acknowledge the
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