Table 2.
Avascular necrosis of the proximal femoral epiphysis
| Years | Hips | AVN | % | Chi-square test |
|---|---|---|---|---|
| 1994 | 835 | 119/835 | 14.3 | χ2 = 2.538 |
| 2008 | 663 | 76/663 | 11.5 | NS p = 0.05 |
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.