Higher Body Mass Index Is Associated with Subjective Olfactory Dysfunction

Area of Science:

• Otolaryngology
• Obesity Research
• Sensory Science

Background:

• Morbid obesity is associated with changes in olfactory acuity.
• No prior studies have directly assessed Body Mass Index (BMI) in individuals with olfactory dysfunction.
• Understanding the relationship between BMI and smell dysfunction is crucial for comprehensive patient care.

Purpose of the Study:

• To compare Body Mass Index (BMI) between patients with subjective olfactory dysfunction and those without.
• To investigate the potential association between high BMI and olfactory complaints.

Main Methods:

• Retrospective matched case-control study design.
• Inclusion of 60 patients with subjective smell dysfunction and 60 matched controls from a tertiary care center.
• Exclusion of neoplastic and obstructive causes of smell loss; review of demographics, BMI, and smoking status; statistical analysis using Chi-square testing.

Main Results:

• A higher proportion of patients with olfactory dysfunction were overweight or obese (80%) compared to controls (60%).
• A statistically significant difference in stratified BMI was observed between the olfactory dysfunction and control groups (p = 0.0168).
• This indicates a strong association between elevated BMI and the presence of olfactory dysfunction.

Conclusions:

• The study suggests a significant association between high Body Mass Index (BMI) and olfactory dysfunction.
• Further prospective research is recommended to confirm if increased BMI is a risk factor for olfactory loss.
• Investigating the role of olfactory loss in the dietary and feeding behaviors of obese individuals is warranted.