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Table 2 Demographic results of the procedure

From: Modified trapdoor procedures using autogenous tricortical iliac graft without preserving the broken cartilage for treatment of osteonecrosis of the femoral head: a prospective cohort study with historical controls

 

Clinical failure rate

P value

Radiographical failure rate

P value

The experimental group

The“light bulb” group

The experimental group

The “light bulb” group

Preoperative stage

 ARCO II

1/45

3/46

0.617

2/45

3/46

1.000

 ARCO III

4/22

12/26

0.041

5/22

15/26

0.014

Size

 B

1/25

2/27

1.000

1/25

3/27

0.611

 C

4/42

13/45

0.023

6/42

15/45

0.038

Location

 B

0/12

2/11

0.217

0/12

3/11

0.093

 C1

1/29

4/32

0.357

2/29

5/32

0.429

 C2

4/26

9/29

0.173

5/26

10/29

0.205