"Sniffin' sticks": screening of olfactory performance

Area of Science:

• Neuroscience
• Otolaryngology
• Psychophysics

Background:

• Olfactory dysfunction is a common condition impacting quality of life.
• Accurate and accessible methods for olfactory assessment are needed for clinical practice.
• Existing tests may be time-consuming or costly for routine screening.

Purpose of the Study:

• To introduce and evaluate the "Sniffin' Sticks" as a novel, portable test for nasal chemosensory performance.
• To compare the Sniffin' Sticks test with a scaled version of the University of Pennsylvania Smell Identification Test (UPSIT), the CC-SIT.
• To assess the utility of Sniffin' Sticks in identifying olfactory impairments.

Main Methods:

• The Sniffin' Sticks test, a pen-like odour-dispensing device, was used for odour identification.
• A forced-choice, multiple-choice format with seven odours was employed.
• The test was administered to 146 subjects and compared with the CC-SIT.
• Preliminary data were collected from nine patients with olfactory impairment (anosmia/hyposmia).

Main Results:

• Sniffin' Sticks showed a higher correlation with subject age compared to CC-SIT.
• The test revealed a more pronounced difference in olfactory sensitivity between women and men.
• A slightly higher correlation between age and olfactory performance was observed with Sniffin' Sticks.
• Patients with olfactory impairment scored significantly lower than healthy controls (p < 0.001).

Conclusions:

• Sniffin' Sticks is a valuable tool for the routine clinical assessment of olfactory identification.
• The test is suitable for repetitive and inexpensive screening of olfactory function.
• Its portability and ease of use make it practical for time- and cost-sensitive clinical settings.