Olfactory Function in Autism Spectrum Disorder Across the Lifespan: A Systematic Review and Meta-Analysis.
Isabelle Cullen, Elisa Dal Bò, Peace Maddox et al.
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In 30 seconds
This systematic review and meta-analysis examined olfactory function in 1,580 autistic and 7,698 non-autistic individuals. Autistic individuals demonstrated significantly poorer olfactory performance (g = -0.64), particularly in psychophysical testing (g = -0.58) and informant reports (g = -1.31). The findings suggest pronounced olfactory deficits in autism, especially in childhood.
Key findings
- Autistic individuals showed significantly poorer olfactory performance than non-autistic individuals (g = -0.64).
- Psychophysical testing revealed reduced olfactory performance in autistic individuals (g = -0.58).
- Informant reports indicated even greater deficits in olfactory function (g = -1.31).
- Moderate deficits in olfactory function were observed in autistic children (g = -0.88).
Why it matters
Understanding olfactory function in autism is crucial for developing age-appropriate assessments and interventions. Clinicians can better support autistic individuals by recognizing sensory processing differences that impact daily life.