TABLE II.

Comparison of SSMS and TOCI Systems According to TW3 Stages Corresponding with Each at Different Pubertal Stages

	TW3 Stage*
Pubertal Stage	Skeletal Maturity Stage	DP	MP	PP	MC	AS	Radius
SSMS
Juvenile slow	SSMS 1	E	E	E	E		Ignored
Preadolescent slow	SSMS 2 (early)	F	F	F	F		Ignored
Preadolescent slow	SSMS 2 (late†)	G	G	G	G		Ignored
Adolescent rapid—early	SSMS 3	G	G	G	G		Ignored
Adolescent rapid—late	SSMS 4	H	G	G	G		Ignored
Adolescent steady—early	SSMS 5	I	G	G	G		Ignored
Adolescent steady—late	SSMS 6	I	H	H	H		Ignored
Early mature	SSMS 7	I	I	I	I		Non-I
Mature	SSMS 8	I	I	I	I		I
TOCI
Juvenile	TOCI 1	Non-I		E		−	Ignored
Prepubertal	TOCI 2	Non-I		F		+	Ignored
Pubertal onset	TOCI 3	Non-I		F		+	Ignored
Ascending	TOCI 4	Non-I		G (early)		+	Ignored
Peak height velocity	TOCI 5	Non-I		G (advanced)		+	Ignored
Early descending	TOCI 6	I		G (advanced)		+	Ignored
Mid-descending	TOCI 7	I		H		+	Ignored
Late descending	TOCI 8	I		I		+	Non-I
End							I

^*Only the key main dominant TW3 stages (E through I) are shown. DP = epiphysis of the distal phalanx (all 5 digits for SSMS and thumb for TOCI), MP = epiphysis of the middle phalanx in the 2nd through 5th digits, PP = epiphysis of the proximal phalanx (all 5 digits for SSMS and thumb for TOCI), MC = metacarpal bone of all 5 digits, AS = adductor sesamoid of thumb, Non-I = any TW3 stage except stage I, − = non-ossified, and + = ossified.

^†TW3 stage G occurs in most but not all digital epiphyses.