Table 3.

Descriptive statistics for predicted maturity offset and ages at peak height velocity (PHV), and differences of predicted age at PHV minus observed age at PHV (criterion) with each equation 3 years before to 3 years after observed age at PHV in boys

Years relative to PHV	N	Maturity offset, years						Predicted age at PHV, years						Predicted age at PHV minus observed age at PHV, years
		Moore-1		Moore-2		Mirwald		Moore-1		Moore-2		Mirwald		Moore-1		Moore-2		Mirwald
		M	SD	M	SD	M	SD	M	SD	M	SD	M	SD	M	SD	M	SD	M	SD
−3	185	−2.35	0.73	−2.37	0.77	−2.67	0.70	13.43	0.53	13.45	0.49	13.74	0.64	−0.63	0.69**	−0.61	0.73***	−0.32	0.66
−2	180	−1.71	0.73	−1.67	0.79	−2.05	0.70	13.77	0.51	13.73	0.46	14.11	0.63	−0.27	0.69	−0.30	0.75*	0.07	0.67
−1	184	−0.96	0.77	−0.87	0.84	−1.31	0.73	14.02	0.51	13.93	0.47	14.37	0.64	−0.02	0.73	−0.11	0.78	0.32	0.68*
0	179	−0.01	0.82	0.09	0.87	−0.32	0.80	14.07	0.52	13.96	0.49	14.38	0.67	0.02	0.76	−0.08	0.81	0.33	0.73*
1	188	1.03	0.85	1.09	0.89	0.78	0.83	14.02	0.54	13.96	0.50	14.27	0.70	−0.04	0.79	−0.10	0.82	0.21	0.75
2	187	1.94	0.85	1.91	0.88	1.69	0.81	14.08	0.55	14.11	0.51	14.33	0.72	0.06	0.80	0.09	0.84	0.31	0.76
3	177	2.73	0.82	2.62	0.87	2.43	0.78	14.26	0.55	14.37	0.51	14.56	0.71	0.26	0.79	0.37	0.83**	0.56	0.75

Moore-1: recommended equation, age and sitting height, Moore-2: alternative equation, age and height [13], Mirwald: original equation [3]

M mean, SD standard deviation

* p < 0.05; ** p < 0.01; *** p < 0.001