LP: LT ratio (LP being length of patella and LT being the length of the tendon) less than 1.00 indicates.
|A||Malunited intercondylar fracture femur|
Insall Salvati ratio is PTL / PL (as shown in fig) or LT / LP.
Normal is 0.8 to 1.2. If it is more than 1.2 is called high riding patella alta.
Less than 0.8 is patella baja (Patella infra)
In question they have reverse this Insall Salvati ratio.