Development of a Risk-Stratification Tool for Nonsteroidal Anti-Inflammatory Drug Hypersensitivity on a Large Cohort

Area of Science:

• Allergy and Immunology
• Clinical Pharmacology
• Risk Assessment

Background:

• Nonsteroidal anti-inflammatory drug (NSAID) hypersensitivity lacks a validated risk stratification tool.
• Accurate risk assessment is crucial for patient management and diagnostic testing.

Purpose of the Study:

• To develop and validate a novel risk stratification tool for nonsteroidal anti-inflammatory drug (NSAID) hypersensitivity.
• To predict the likelihood of a positive drug provocation test (DPT) in patients with suspected NSAID hypersensitivity.

Main Methods:

• Retrospective study of 1,304 patients with a history of NSAID hypersensitivity.
• Development of a risk score (CA4TCH) based on clinical history elements using a data-driven approach.
• External validation of the CA4TCH score on an independent cohort.

Main Results:

• The CA4TCH score incorporates reaction chronology, symptoms (anaphylaxis, respiratory), culprit NSAID (aspirin), comorbidities (asthma, atopy), time to DPT, number of chemical classes, and hives.
• CA4TCH demonstrated a sensitivity of 78.4% and specificity of 70.4% for predicting positive DPTs.
• The tool correctly identified a significant proportion of negative subjects and accurately classified patients with NSAID-exacerbated respiratory and cutaneous disease.

Conclusions:

• The CA4TCH score provides personalized risk predictions for NSAID hypersensitivity at patient presentation.
• It aligns with clinical expertise and European guidelines for patient triage and risk assessment.
• CA4TCH facilitates better management of patients with suspected NSAID hypersensitivity.