|
Parameters
|
ARCO stage
|
OR (95% CI) of collapsed stage
|
Adjusted-OR (95% CI) of collapsed stage *
|
|---|
|
Total
|
II
|
IIIA
|
IIIB
|
IIIC
|
|---|
|
Age (years, n)
| | | | | |
0.91 (0.72–1.16)
| |
|
≤ 11
|
17
|
4
|
5
|
3
|
5
| | |
|
12
|
13
|
3
|
4
|
2
|
4
| | |
|
13
|
20
|
10
|
4
|
2
|
4
| | |
|
14
|
25
|
9
|
9
|
2
|
5
| | |
|
15
|
24
|
8
|
9
|
2
|
5
| | |
|
≥ 16
|
16
|
6
|
3
|
5
|
2
| | |
|
Sex (n)
| | | | | |
0.86 (0.37–1.96)
| |
|
Male
|
78
|
28
|
25
|
10
|
15
| | |
|
Female
|
37
|
12
|
9
|
6
|
10
| | |
|
Symptomatic (n)
| | | | | |
10.24 (4.17–25.1) **
|
6.25 (2.39–16.36) **
|
|
No
|
47
|
30
|
12
|
3
|
2
| | |
|
Yes
|
68
|
10
|
22
|
13
|
23
| | |
|
Interval between fracture and AVN diagnosis (n)
| | | | | |
1.49 (0.81–2.73)
| |
|
Within 1 year
|
71
|
27
|
20
|
11
|
13
| | |
|
1 to 2 years
|
32
|
11
|
10
|
4
|
7
| | |
|
More than 2 years
|
12
|
2
|
4
|
1
|
5
| | |
|
JIC classification (n)
| | | | | |
5.08 (2.54–10.12) **
|
3.41 (1.62–7.17) **
|
|
A/B
|
13
|
12
|
1
|
0
|
0
| | |
|
C1
|
40
|
17
|
21
|
1
|
1
| | |
|
C2
|
62
|
11
|
12
|
15
|
24
| | |
|
Ratliff classification (n)
| | | | | |
0.15 (0.06–0.37) **
| |
|
I
|
50
|
7
|
8
|
12
|
23
| | |
|
II
|
61
|
29
|
26
|
4
|
2
| | |
|
III
|
4
|
4
|
0
|
0
|
0
| | |
- ARCO Association Research Circulation Osseous, AVN avascular necrosis, JIC Japanese Investigation Committee
- *Multivariate analysis with method of “Forward LR”
- **p < 0.05
