Table 3.

First-year height velocity (cm/y) during rhGH treatment in low (<2 µg/L) and high (≥2 µg/L) stimulated GH groups according to different baseline serum IGF-I concentrations (N = 514)

	Baseline IGF-I < cutoff			Baseline IGF-I ≥ cutoff
IGF-I cutoff (µg/L)	AHV mean (cm/y)	AHV SD (cm/y)	n	AHV mean (cm/y)	AHV SD (cm/y)	n
GH < 2
0	—	—	—	9.41	2.96	31
10	12.23	3.06	5	8.87	2.67	26
20	12.46	2.40	8	8.35	2.36	23
30	12.63	2.31	9	8.09	2.06	22
40	12.63	2.31	9	8.09	2.06	22
50	11.88	2.45	12	7.85	2.08	19
60	11.14	3.21	14	7.98	1.83	17
70	11.03	3.12	15	7.89	1.84	16
80	10.53	3.13	18	7.85	1.88	13
90	10.08	3.28	20	8.19	1.83	11
100	9.67	3.30	23	8.65	1.56	8
110	9.67	3.30	23	8.65	1.56	8
120	9.57	3.27	24	8.86	1.56	7
GH ≥ 2
0	—	—	—	8.45	1.71	483
10	10.55	2.19	11	8.40	1.66	472
20	10.03	2.39	26	8.36	1.62	457
30	9.75	2.30	50	8.29	1.56	433
40	9.49	2.06	79	8.24	1.55	404
50	9.22	1.81	123	8.18	1.59	360
60	9.13	1.76	158	8.11	1.58	325
70	9.07	1.75	202	7.99	1.52	281
80	8.91	1.75	238	8.00	1.53	245
90	8.83	1.83	284	7.90	1.33	199
100	8.74	1.77	327	7.82	1.37	156
110	8.65	1.77	363	7.82	1.31	120
120	8.61	1.77	389	7.76	1.22	94

Abbreviations: AHV, annualized height velocity; GH, growth hormone; IGF-I, insulin-like growth factor-I.