. Author manuscript; available in PMC: 2015 Aug 26.

Published in final edited form as: Br J Sports Med. 2014 May 16;48(13):1032–1036. doi: 10.1136/bjsports-2014-093574

Table 2.

Description of maturity, body size and bone outcomes in Iowa Bone Development Study participants at age 17

	Girls (n=186)		Boys (n=160)
	Mean	SD	Mean	SD
Age at PHV, years	11.8	0.6	13.7	0.7
Height, cm	165.6	6.7	178.7	7.5
Weight, kg	66.8	16.8	78.7	17.2
Whole body BMC, g	1794.0	325.8	2376.4	446.6
Hip BMC, g	32.98	6.27	47.09	9.85
Hip BMD, g/cm²	1.018	0.139	1.133	0.159
Femoral Neck CSA, cm²	3.23	0.60	4.16	0.81
Femoral Neck Section Modulus, cm³	1.48	0.37	2.17	0.51
Bone Stress Index (tibia 4% site), mg²/mm⁴	98.4	23.7	133.5	31.6
Polar moment of inertia (tibia 38% site), mm⁴	1496.4	338.9	2028.3	437.1
Polar moment of inertia (tibia 66% site), mm⁴	2217.4	506.3	3029.1	673.1

BMC, bone mineral content; BMD, bone mineral density; CSA, cross-sectional area; PHV, peak height velocity.