Table 1. Summary of bone traits in the population.

Traits	Sample size	Minimum	Maximum	Mean	SD
Femur BMD g/cm2	1406	0.200	0.580	0.329	0.045
Femur BMC g	1406	1.630	5.310	2.996	0.530
Femur weight g	1409	3.100	9.300	6.180	0.895
Tibia breaking strength N	1397	45.000	394.200	189.054	55.397
Tibia breaking work N·mm	1393	15.100	539.200	139.828	77.273