Table 1

Descriptive statistics for age, anthropometry, and densitometry data by sex

	Units	Mean	SD	Minimum	Maximum
*UK growth reference, 1990.²⁴
Girls (n = 171)
Age	years	11.5	3.5	5.0	18.6
Height	cm	146.8	19.0	109	180
Z-score height*	–	0.36	0.94	−1.98	2.84
Body mass	kg	42.2	15.6	18	96
Z-score body mass*	–	0.30	0.93	−1.81	3.10
Total BMD	g/cm²	0.96	0.13	0.73	1.25
Total BMC	g	1562	597	636	2980
Total Area	cm²	1569	415	847	2490
BMDoc	g/cm²	0.414	0.091	0.23	0.67

Boys (n = 123)
Age	years	10.6	3.1	5.1	16.3
Height	cm	144.6	19.4	110	189
Z-score height*	–	0.42	0.90	−1.81	2.72
Body mass	kg	39.5	16.1	17	98
Z-score body mass*	–	0.49	0.92	−1.60	2.96
Total BMD	g/cm²	0.94	0.12	0.76	1.30
Total BMC	g	1530	621	671	3558
Total Area	cm²	1566	439	869	2751
BMDoc	g/cm²	0.427	0.110	0.22	0.78