Table 2.

Mean residual standard deviations for skeletal maturity scales compare to PGA90% and percentage of adult height. For the ‘preadolescents excluded’, the data was only evaluated once the child entered their adolescent growth spurt (Sanders score $\ge$2).

Sex	Timing to PGA90% (years)				% Adult Height (%)
	All Subjects		Preadolescents Excluded		All Subjects		Preadolescents Excluded
	Males	Females	Males	Females	Males	Females	Males	Females
Sanders	0.927	0.901	0.567	0.626	2.693	3.006	1.499	1.488
GP	0.689	0.672	0.583	0.677	2.029	1.935	1.771	1.752
Fels	0.671	0.605	0.587	0.581	1.726	1.883	1.372	1.490