North African reference equation for peak nasal inspiratory flow

Area of Science:

• Otolaryngology
• Respiratory Medicine
• Anthropometry

Background:

• Peak nasal inspiratory flow (PNIF) assessment is crucial for evaluating nasal airway patency.
• Existing PNIF reference equations may not be universally applicable across diverse ethnic populations.

Purpose of the Study:

• To evaluate the reliability of a prior PNIF reference equation in North African subjects.
• To establish a new, population-specific PNIF reference equation for North African individuals.

Main Methods:

• Collected anthropometric data (height, age, gender) from 212 healthy North African volunteers (13-27 years).
• Measured peak nasal inspiratory flow (PNIF) multiple times.
• Utilized univariate and multiple linear regression to derive the PNIF reference equation.

Main Results:

• The previously published PNIF equation demonstrated poor reliability in the study cohort.
• Developed a new PNIF reference equation: 1.4256 × height (m) + 33.0215 × gender + 1.4117 × age (years) - 136.6778.
• Established the lower limit of normal for PNIF in this population.

Conclusions:

• This study presents the first PNIF reference equation specifically for North African subjects.
• The derived equation facilitates objective assessment of nasal airway patency in patients of North African descent.