Table 3.

Severity of epiphyseal involvement in Legg-Calvé-Perthes' disease.

Study	Year	Location	Catterall class				Lateral pillar group
			I	II	III	IV	A	B	BC	B + BC	C
Rosenfeld et al. [29]	2007	Dallas, TX					7	108	30	138	43
Catterall [1]	1971	London, England	31	31	22	13
Guille et al. [32]	1998	Wilmington, DE	37	120	228	233	155	204		204	204
Wang et al. [33]	1990	Taipei, Taiwan	0	7	19	21
Kim et al. [7]	2006	Japan	30	103	352	210	68	350		350	157
Herring et al. [35]	2004	USA					6	218	61	279	60
Wijesekera [10]	1984	Kurunegala, Sri Lanka	13	21	33	11
Chacko et al. [36]	1986	Karnataka, India	1	13	56	33
Total			112	295	710	521	236	880	91	971	464
Percentage			6.8	18.0	43.3	31.8	14.1	52.7	5.4	58.1	27.8