Audiogram Configuration May Predict Recovery After Sudden Sensorineural Hearing Loss

A new study reveals that audiogram patterns may predict recovery chances in sudden sensorineural hearing loss. Learn how hearing test results influence prognosis and treatment decisions.

Sudden sensorineural hearing loss (SSNHL) is a medical emergency that can cause rapid hearing decline within hours or days. While many patients receive treatment and regain some hearing, recovery outcomes vary significantly. New research suggests that the shape of a patient’s initial hearing test, known as the pure tone audiogram configuration, may provide important clues about recovery chances.

A recent original research study published in Otolaryngology Head and Neck Surgery examined whether different audiogram patterns could predict complete hearing recovery in patients with idiopathic sudden sensorineural hearing loss (ISSNHL).

The researchers found that audiogram configuration was an independent predictor of treatment outcome. Patients with descending and total-deaf audiogram patterns had significantly lower chances of complete recovery compared with patients who showed other patterns.

Understanding Sudden Sensorineural Hearing Loss

Idiopathic sudden sensorineural hearing loss is generally defined as a hearing reduction of at least 30 decibels across three connected frequencies occurring within 72 hours.

The condition affects the inner ear or auditory nerve and may occur without an identifiable cause. Researchers have proposed several possible mechanisms, including viral infections, inflammation, autoimmune reactions, and reduced blood supply to the cochlea.

Although corticosteroid therapy remains the most widely recommended treatment, recovery is unpredictable. Some patients experience almost complete restoration of hearing, while others continue to have significant hearing impairment despite treatment.

Because outcomes differ widely, identifying reliable predictors of recovery is an important goal in hearing research.

Study Overview: How Audiogram Shape Was Evaluated

The study was a retrospective cohort analysis involving 487 adults diagnosed with unilateral ISSNHL between 2012 and 2019 at a tertiary medical centre.

Researchers classified patients into four audiogram groups based on their initial hearing test results:

• Ascending pattern: Low-frequency hearing loss worse than high-frequency loss
• Descending pattern: High-frequency hearing loss worse than low-frequency loss
• Flat pattern: Similar hearing loss levels across frequencies
• Total-deaf pattern: Severe hearing loss across all tested frequencies

The researchers then analyzed whether these patterns were linked to complete hearing recovery after treatment.

Patients received steroid-based therapy, with some also receiving additional treatments such as intravenous steroids, intratympanic steroids, or supportive medications.

Recovery was assessed after three months using established hearing recovery criteria.

Key Findings From the Research

Among the 487 patients included in the study:

• 43.8% had flat audiograms
• 29.4% had descending audiograms
• 21.9% had total-deaf audiograms
• 4.9% had ascending audiograms

Only 80 patients, representing 16.4% of the study group, achieved complete recovery.

Recovery rates differed substantially depending on the audiogram pattern:

• Ascending pattern: 50% achieved complete recovery
• Flat pattern: 25.2% achieved complete recovery
• Descending pattern: 9.8% achieved complete recovery
• Total-deaf pattern: No patients achieved complete recovery

After adjusting for other factors such as age, initial hearing severity, vertigo, and treatment approach, the researchers found that descending and total-deaf patterns remained strong predictors of poorer outcomes.

Why Audiogram Shape Matters

A hearing test does more than measure how much hearing is lost. The pattern of hearing loss across different frequencies may reflect the underlying condition affecting the inner ear.

A descending audiogram pattern often indicates greater damage in high-frequency areas of the cochlea. A total-deaf pattern may represent more extensive cochlear injury.

Researchers suggest that these patterns could reflect differences in inflammation, vascular damage, or other biological processes affecting hearing recovery.

The findings support the idea that audiogram configuration can serve as a simple, accessible prognostic marker during early patient evaluation.

Connection Between Inflammation and Hearing Recovery

Previous studies have suggested that inflammation and vascular factors may influence recovery from sudden hearing loss.

Blood markers such as the neutrophil-to-lymphocyte ratio (NLR), platelet-to-lymphocyte ratio (PLR), systemic immune-inflammatory index (SII), and nutritional indicators have been investigated as possible predictors of hearing outcomes.

The current study did not directly measure inflammatory markers, but the researchers noted that audiogram patterns may represent different biological injury processes inside the cochlea.

Future research combining hearing test patterns with blood biomarkers may improve prediction accuracy.

Implications for Patients and Doctors

The study provides useful information for clinical discussions following sudden hearing loss.

Patients with ascending or flat audiogram patterns may have a more favorable chance of recovery. In contrast, individuals with descending or total-deaf patterns may need realistic counseling regarding expected outcomes.

However, audiogram configuration should not be viewed as a reason to avoid treatment. Early medical evaluation and appropriate therapy remain essential because some patients with poor prognostic indicators may still experience improvement.

The researchers also emphasized that treatment intensity alone did not independently predict complete recovery after adjustment for baseline factors. This suggests that the severity and biological characteristics of the hearing injury may strongly influence outcomes.

Future Role of Predictive Models

Artificial intelligence and statistical prediction models are increasingly being explored in hearing medicine.

Previous studies have shown that machine learning systems can predict hearing recovery using combinations of patient characteristics and audiogram data. However, researchers emphasize that simple and interpretable factors, such as audiogram configuration, remain valuable because they are easy for clinicians to apply.

Future prediction tools may combine:

• Audiogram pattern
• Age
• Initial hearing level
• Time to treatment
• Inflammatory biomarkers
• Other clinical characteristics

Such models could help doctors provide more personalized recovery estimates.

Limitations of the Study

Although the findings are important, several limitations should be considered.

The research was retrospective and conducted at a single medical centre, meaning results may not apply to every patient population.

The study also lacked some potentially important information, including exact treatment timing and inflammatory laboratory measurements.

Additionally, the ascending audiogram group was relatively small, so conclusions about this pattern require further confirmation.

Larger prospective studies involving multiple hospitals will be needed to validate these findings.

Conclusion

This original research highlights the potential value of audiogram configuration as a predictor of recovery in idiopathic sudden sensorineural hearing loss.

The study found that descending and total-deaf hearing patterns were associated with lower chances of complete recovery, while ascending and flat patterns showed better outcomes.

Because audiogram configuration is available immediately after hearing testing, it may become an important component of future prognostic tools and personalized treatment discussions.

Further research combining hearing patterns with biological markers may help create more accurate prediction systems for people experiencing sudden hearing loss.

Source

Guo L, Wang J, Gao Y, Wu B, Ren X, Li Y. “Audiogram Configuration Predicts Treatment Response in Sudden Sensorineural Hearing Loss.” Otolaryngology Head and Neck Surgery. First published June 17, 2026. DOI: 10.1002/ohn.70314.

Medical Disclaimer

This article is for educational and informational purposes only. It does not replace professional medical advice, diagnosis, or treatment. Anyone experiencing sudden hearing loss should seek urgent evaluation from a qualified healthcare professional, as early assessment and treatment may influence outcomes.