Table 5 Radiolucencies: appearance in Gruen Zones over the course of 5 years
Radiolucencies | 1 year | 2 year | 3 year | 5 year |
|---|---|---|---|---|
AP: Y/N | 51% | 38% | 28% | 20% |
AP Gruen zone 1 | 41% | 31% | 26% | 19% |
AP Gruen zone 2 | – | 2% | 2% | – |
AP Gruen zone 3 | 13% | 7% | 2% | – |
AP Gruen zone 4 | 17% | 9% | 4% | – |
AP Gruen zone 5 | 16% | 8% | 3% | – |
AP Gruen zone 6 | 10% | 3% | 3% | 2% |
AP Gruen zone 7 | 13% | 7% | 55 | 2% |
Axial: Y/N | 35% | 21% | 17% | 9% |
Axial Gruen zone 8 | 26% | 16% | 14% | 9% |
Axial Gruen zone 9 | 4% | 5% | 3% | 2% |
Axial Gruen zone 10 | 11% | 8% | 6% | – |
Axial Gruen zone 11 | 9% | 6% | 5% | – |
Axial Gruen zone 12 | 11% | 8% | 5% | – |
Axial Gruen zone 13 | 5% | 6% | 4% | 3% |
Axial Gruen zone 14 | 13% | 7% | 6% | 6% |