rapid_acetabular_score: RAPID Score for Acetabular Chondrolabral Disruption

In cliot: Clinical Indices and Outcomes Tools

RAPID Score for Acetabular Chondrolabral Disruption

Description

Calculates the Rapidly Assessed Predictor of Intraoperative Damage (RAPID) score. This preoperative scoring system predicts the presence of high-grade acetabular labrum articular disruption (ALAD grade 3 or 4) in patients undergoing hip arthroscopy for femoroacetabular impingement.

Usage

rapid_acetabular_score(sex, tonnis_grade, cam_morphology)

Arguments

sex	String. Patient sex ("Male" or "Female"). Male sex adds 1 point.
tonnis_grade	Numeric (0-2). Tönnis classification of osteoarthritis. 0: No signs of OA (0 points). 1: Increased sclerosis, slight narrowing/lipping (+2 points). 2: Small cysts, moderate narrowing, loss of sphericity (+3 points). Note: Grade 3 is a contraindication to arthroscopy and not scored.
cam_morphology	Numeric (0 or 1). Presence of Cam morphology, defined as an alpha angle > 55 degrees. (1 = Present/Yes, +1 point).

Value

A list containing:

RAPID_Score	The calculated total score (Range 0-5).
Risk_Prediction	Estimated probability of finding high-grade chondral damage intraoperatively.

References

Nwachukwu BU, Chang B, Rotter B, et al. The Rapidly Assessed Predictor of Intraoperative Damage (RAPID) Score: An In-Clinic Predictive Model for High-Grade Acetabular Chondrolabral Disruption. Am J Sports Med. 2019;47(2):395-400. doi:10.1177/0363546518813091

Examples

# Example 1: High Risk Candidate
# Male (+1), Tonnis Grade 1 (+2), Cam Present (+1)
# Score = 4
rapid_acetabular_score("male", 1, 1)

# Example 2: Low Risk Candidate
# Female (0), Tonnis Grade 0 (0), Cam Absent (0)
# Score = 0
rapid_acetabular_score("female", 0, 0)

cliot documentation built on Dec. 1, 2025, 1:06 a.m.