After thyroid supplementation , Group A had higher Ft4 concentrations compared with Group B ( 2.140.06 vs 1.480.06 ng/dl , p = 0.01 ) , their growth velocity was significantly higher ( 2.30.1 vs 1.50.2 cm/4months ) , and they exhibited a greater increase in IGF-I after GH administration ( Group A : 32.53.8 % vs Group B 17.32.6 % ) .