Table 2.

Descriptive statistics for chronological age, actual maturity offset, predicted maturity offset and ages at peak height velocity (PHV), and the differences of predicted age at PHV minus observed age at PHV (criterion) with each equation in girls

N	Age, years		Maturity offset, years						Predicted age at PHV, years				Predicted age at PHV minus observed age at PHV, years
			Actuala		Predicted
					Moore-1		Mirwald		Moore-1		Mirwald		Moore-1		Mirwald
	M	SD	M	SD	M	SD	M	SD	M	SD	M	SD	M	SD	M	SD
196	8.0	0.3	−3.85	1.04	−3.52	0.26	−3.56	0.35	11.57	0.19	11.60	0.29	−0.33**	0.94	−0.29*	0.91
175	9.0	0.3	−2.90	1.05	−2.84	0.31	−2.88	0.39	11.82	0.22	11.85	0.32	−0.06	0.93	−0.03	0.90
188	10.0	0.3	−1.88	1.05	−2.07	0.36	−2.13	0.45	12.07	0.27	12.13	0.38	0.19	0.89	0.24	0.84
185	11.0	0.3	−0.87	1.03	−1.22	0.39	−1.28	0.48	12.24	0.32	12.29	0.43	0.35***	0.85	0.41***	0.80
181	12.0	0.3	0.25	1.00	−0.28	0.45	−0.36	0.54	12.31	0.37	12.40	0.48	0.43***	0.77	0.50***	0.71
190	13.0	0.3	1.09	1.03	0.63	0.47	0.50	0.53	12.38	0.38	12.51	0.46	0.46***	0.86	0.59***	0.79
196	14.0	0.3	2.12	1.02	1.51	0.45	1.32	0.47	12.50	0.37	12.68	0.41	0.62***	0.95	0.79***	0.88
186	15.0	0.3	3.12	1.05	2.31	0.45	2.04	0.44	12.71	0.38	12.97	0.40	0.81***	1.03	1.08***	0.98
173	16.0	0.3	4.12	1.03	3.03	0.44	2.64	0.41	12.98	0.41	13.35	0.40	1.08***	1.05	1.46***	1.01

Moore-1: recommended equation with age and height [7], Mirwald: original equation [3]

M mean, SD standard deviation

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

^aActual maturity offset = observed age at PHV − chronological age at prediction; predicted offset − actual offset = predicted age − observed age at PHV