Predictors for benign paroxysmal positional vertigo with positive Dix-Hallpike test

Area of Science:

• Neurology
• Otolaryngology
• Diagnostic Medicine

Background:

• Patient history is crucial for diagnosing dizziness.
• No prior studies have assessed the diagnostic value of individual historical elements for dizziness.

Purpose of the Study:

• To identify and validate specific patient history questions for diagnosing benign paroxysmal positional vertigo (BPPV).
• To develop a predictive model for BPPV diagnosis based on patient history.

Main Methods:

• A disease prediction model was developed and validated using data from dizziness patients at Chiba University Hospital.
• Binomial logistic regression analyzed historical data from 145 patients (model construction) and 61 patients (validation).
• The study focused exclusively on posterior semicircular canal BPPV with a positive Dix-Hallpike test (DHT+BPPV) to ensure diagnostic clarity.

Main Results:

• Two independent predictors for DHT+BPPV were identified: dizziness duration ≤15 seconds (OR 4.36) and onset when turning over in bed (OR 10.17).
• An affirmative answer to both questions yielded a likelihood ratio of 6.81 for diagnosing DHT+BPPV.
• Negative answers to both questions resulted in a likelihood ratio of 0.19, aiding in excluding DHT+BPPV.

Conclusions:

• Dizziness duration of ≤15 seconds and onset when turning over in bed are the most significant historical indicators for BPPV.
• These two questions can effectively aid in the diagnosis or exclusion of DHT+BPPV.