- Normal range and clinically important values of patellar height indices.
| Index name | Normal range | Patella baja | Patella alta |
|---|---|---|---|
| Insall-Salvati index | 0.8-1.2 | <0.8 | >1.2 |
| Blackburne-Peel index | 0.5-1.0 | <0.5 | >1.0 |
| Caton-Deschamps index | 0.6-1.3 | <0.6 | >1.3 |
| Modified Insall-Salvati index | 1.2-2.1 | <1.2 | >2.1 |