Table 4

Univariate analysis of independent variables with BMC of the distal radius

		Boys			Girls
		n	Mean		SE	p value	n	Mean	SE	p value
Genitalia
Stage 1, 2, 3	66	0.585	0.011	0.0024-150
Stage 4, 5	26	0.661	0.024
Testicular size
⩽ 12 ml	55	0.575	0.013	< 0.0014-150
> 12 ml	37	0.653	0.017
Pubic hair
Stage 1, 2, 3	82	0.591	0.010	< 0.0014-150	60	0.619	0.011	< 0.0014-150
Stage 4, 5	10	0.735	0.039		27	0.694	0.011
Breast
Stage 1, 2, 3					29	0.585	0.016	< 0.0014-150
Stage 4, 5					58	0.671	0.010
Menarche
No					38	0.603	0.015	< 0.0014-150
Yes					49	0.673	0.010
Group
Art	39	0.573	0.015	0.0094-150	46	0.626	0.013	0.0554-150
Physical education	53	0.631	0.015		41	0.661	0.013
Ball games
No	62	0.602	0.014	0.5124-150	69	0.633	0.011	0.0564-150
Yes	30	0.617	0.017		18	0.677	0.018
Track and field
No	74	0.594	0.011	0.0784-150	75	0.642	0.010	0.7924-150
Yes	18	0.657	0.032		12	0.649	0.018
Water sports
No	83	0.603	0.012	0.3554-150	80	0.642	0.009	0.7814-150
Yes	9	0.638	0.023		7	0.651	0.045
Other sports
No	88	0.605	0.011	0.6774-150	79	0.641	0.010	0.5784-150
Yes	4	0.651	0.100		8	0.659	0.040
Level of sports
PE group—National/school team	38	0.635	0.017	0.040^†	30	0.672	0.015	0.066^†
PE group—Recreational purpose	15	0.622	0.032		11	0.634	0.023
ARTS group—Recreational purpose	33	0.572	0.016		39	0.623	0.014