The digital scent device as a new concept for olfactory assessment

Area of Science:

• Olfactory Neuroscience
• Biomedical Engineering
• Clinical Diagnostics

Background:

• Clinical olfactory measurements face significant challenges.
• A handheld digital scent device (DSD) was developed for self-administered odor assessment.
• The DSD features an integrated odor storage system and a touchscreen interface.

Purpose of the Study:

• To evaluate the feasibility of the DSD as an olfactory assessment test.
• To compare the DSD's performance against a standard smell identification test.
• To assess the test-retest reliability of the DSD.

Main Methods:

• 180 participants completed smell tests using both the DSD and the 40-item Smell Identification Test (SIT-40).
• The DSD and SIT-40 used identical odors and response options.
• Scores, completion times, correlation, agreement, and test-retest reliability were analyzed.

Main Results:

• DSD test scores were significantly higher than SIT-40 scores (p=0.005).
• The DSD test was completed significantly faster (p<0.001).
• Strong correlation (rho=0.74) and agreement (coefficient=0.672) were found between the tests, with high DSD test-retest reliability (0.820).

Conclusions:

• The handheld digital scent device (DSD) is feasible for olfactory assessment.
• Digitalization of olfactory testing offers new research avenues.
• Data science integration with digital olfaction holds future potential.