Recurrent_Instability_of_the_patella_RIP_score v.1

Recurrent Instability of the Patella (RIP) Score predicts risk of recurrent instability after primary patellar dislocation.

Therese Lindberg

therese.lindberg@cambio.se

@CambioCDS

To predict the risk of recurrent instability after primary patellar dislocation.

Use in patients with a first-time patellar dislocation (adults and adolescents). The RIP-score is calculated based on 4 parameters: Age <25 years, skeletal immaturity, dejour A-D dysplasia and TT-TG/PL ≥0.5. Interpretation: RIP Score Risk group Risk of recurrent instability: At 1 year At 2 years At 5 years At 10 years 0-1 Low 0% 0% 0% 0% 2-3 Intermediate 16.7% 27.8% 30.6% 30.6% 4-5 High 15.6% 37.5% 65.6% 79.2%

1. Hevesi M, Heidenreich MJ, Camp CL, et al. The Recurrent Instability of the Patella Score: A Statistically Based Model for Prediction of Long-Term Recurrence Risk After First-Time Dislocation. Arthroscopy. 2019;35(2):537-543.

OBSERVATION.basic_demographic.v1, EVALUATION.recurrent_instability_of_the_patella_rip_score.v0