Olfactory dysfunction in Japanese children with moderate-to-severe allergic rhinitis

Area of Science:

• Otorhinolaryngology
• Pediatric Allergy
• Olfactory Neuroscience

Background:

• Quantitative studies on olfaction in pediatric allergic rhinitis (AR) are limited.
• Allergic rhinitis can affect nasal airflow and olfactory epithelium, potentially leading to olfactory dysfunction.

Purpose of the Study:

• To investigate olfactory dysfunction in children diagnosed with allergic rhinitis.
• To correlate olfactory deficits with AR severity and associated sinonasal conditions.

Main Methods:

• A cohort of children aged 6-9 years with AR (n=30) and controls (n=10) were evaluated.
• Olfactory identification was assessed using the Universal Sniff (U-Sniff) test and Open Essence (OE) test.
• Nasal mucosa, eosinophil counts, IgE levels, sinusitis, and adenoid hypertrophy were also assessed.

Main Results:

• No significant difference in U-Sniff scores between AR and control groups.
• Open Essence (OE) scores were significantly lower in the AR group compared to controls (p=0.007).
• AR patients demonstrated lower correct answer rates for 'wood', 'cooking gas', and 'sweaty socks' odors.

Conclusions:

• Pediatric allergic rhinitis patients exhibit reduced olfactory identification ability.
• The degree of olfactory dysfunction may correlate with AR severity and sinonasal findings.
• Olfactory dysfunction in AR could impair the detection of critical environmental cues, such as gas leaks.