Mid-term results of sub-trochanteric valgus osteotomy for symptomatic late stages Legg-Calvé-Perthes disease

Table 1 The clinical picture of the surgically treated patients with their proportions, n (%)

Clinical picture	Count
Pain	31 (86.1)
Trendlenburg gait and abductor weakness	30 (83.3)
External rotation gait	29 (80.5)
Limb length discrepancy	34 (94.4)
Limited abduction	3 (8.3)
Fixed flexion deformity	9 (25)

Table 2 Details of patients treated by femoral valgus osteotomy

Case	Sex	Age at surgery	Waldenström classification	Joseph classification[30]	Catterall classification[31]	Stulberg classification	Mose[32] at last F.U. (mm)	Follow up period	Implant
1	M	9	Re-ossification	IIIb	III	III	3	9	Contoured plate
2	M	8	Re-ossification	IIIa	III	III	2	8	Contoured plate
3	F	9	Healing	IV	IV	IV	5	10	DHS
4	M	11	Re-ossification	IIIb	III	IV	8	11	DHS
5	F	10	Re-ossification	IIIb	IV	III	5	9	Contoured plate
6	F	8	Healing	IV	III	III	6	9	Contoured plate
7	M	9	Re-ossification	IIIb	II	II	1	8	Contoured plate
8	M	9	Re-ossification	IIIa	II	II	2	9	Contoured plate
9	M	12	Healing	IV	IV	III	4	10	DHS
10	F	10	Healing	IV	IV	III	5	9	Contoured plate
11	M	9	Re-ossification	IIIa	III	IV	9	8	Contoured plate
12	F	8	Healing	IV	II	II	1	8	DHS
13	M	9	Healing	IV	III	III	3	9	Contoured plate
14	M	10	Re-ossification	IIIb	III	III	4	10	Contoured plate
15	F	11	Re-ossification	IIIb	IV	III	4	9	Contoured plate
16	M	10	Re-ossification	IIIb	III	IV	8	9	DHS
17	F	11	Healing	IV	II	II	1	8	Contoured plate
18	M	9	Healing	IV	IV	IV	7	11	Contoured plate
19	F	8	Re-ossification	IIIa	III	III	2	9	DHS
20	M	9	Healing	IV	III	III	4	10	Contoured plate
21	M	8	Healing	IV	II	II	1	11	DHS
22	M	9	Re-ossification	IIIb	III	II	2	9	Contoured plate
23	F	9	Re-ossification	IIIa	II	III	6	8	DHS
24	M	8	Re-ossification	IIIa	III	III	5	9	Contoured plate
25	F	10	Healing	IV	IV	IV	8	10	DHS
26	F	11	Healing	IV	III	II	1	9	Contoured plate
27	M	9	Healing	IV	IV	IV	5	9	Contoured plate
28	M	9	Re-ossification	IIIa	III	III	2	9	Contoured plate
29	F	8	Re-ossification	IIIa	II	II	2	9	DHS
30	M	8	Healing	IV	III	III	4	10	Contoured plate
31	M	9	Re-ossification	IIIb	III	III	5	8	DHS
32	M	10	Re-ossification	IIIb	III	IV	4	8	DHS
33	M	11	Re-ossification	IIIb	II	II	2	9	Contoured plate
34	M	10	Healing	IV	IV	IV	6	9	Contoured plate
35	M	9	Healing	IV	IV	IV	10	9	DHS
36	F	12	Healing	IV	III	II	1	10	Contoured plate

DHS: Dynamic hip screw; F: Female; M: Male.

Table 3 Statistical analysis of valgus osteotomy case series

Descriptive statistics	n	Min	Max	mean ± SD
Age	36	8	12	9.4 ± 1.5
Follow up	36	8	11	9.36 ± 2.2
IOWA score preoperative	36	30	70	53.3 ± 10.1
Postoperative after 1 yr	36	77	100	85.4 ± 5.4
Final	36	79	100	89.4 ± 5.2
Internal rotation degree	36	10	40	22.1 ± 5.26
Abduction degree	36	10	35	15.7 ± 6.2