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Related Experiment Video

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Nasometric sensitivity and specificity: a cross-dialect and cross-culture study

R M Dalston1, G S Neiman, G Gonzalez-Landa

  • 1Department of Surgery, School of Medicine, University of North Carolina, Chapel Hill 27599-7450.

The Cleft Palate-Craniofacial Journal : Official Publication of the American Cleft Palate-Craniofacial Association
|May 1, 1993
PubMed
Summary

This study found a nasalance score of 28 effectively identifies hypernasality in patients. This instrumental measure correlates well with clinical judgment, improving diagnostic efficiency.

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Area of Science:

  • Speech-Language Pathology
  • Medical Diagnostics

Background:

  • Hypernasality affects oral-nasal resonance balance.
  • Clinical judgments are common but can be subjective.

Purpose of the Study:

  • To evaluate the correlation between clinical judgments and nasometric assessment of hypernasality.
  • To determine an optimal instrumental threshold for identifying hypernasality.

Main Methods:

  • 514 patients from US and Spain clinics evaluated.
  • Clinical judgments and nasometric data (oral-nasal resonance balance) collected.
  • Pearson correlation and prediction analyses performed.

Main Results:

  • A strong correlation (r=0.78) was found between clinical and instrumental measures.
  • A threshold nasalance score of 28 optimized identification of hypernasality.
  • Sensitivity (0.87), specificity (0.86), and overall efficiency (0.87) were achieved.

Conclusions:

  • Nasometric assessment provides an objective measure for hypernasality.
  • A nasalance score of 28 is a clinically relevant threshold for diagnosis.
  • Instrumental assessment enhances diagnostic accuracy for hypernasality.