[Evaluating guidelines for "selection and training of staff for odor analysis"--a 7-year longitudinal study]

Area of Science:

• Olfactory science
• Sensory analysis
• Human physiology

Background:

• The "selection and schooling of personnel for odour analysis" guideline requires reevaluation.
• Longitudinal studies are crucial for assessing the reliability of olfactory assessment methods.
• Understanding individual olfactory capabilities is vital for accurate sensory analysis.

Purpose of the Study:

• To reexamine and validate the established guideline for selecting and training personnel involved in olfactory analysis.
• To assess the efficacy of a two-step selection process in identifying olfactory impairments.
• To establish reliable metrics for normal olfactory function and the impact of training on olfactory perception.

Main Methods:

• A 7-year longitudinal study was conducted on a representative group.
• A two-step selection process was employed to assess olfactory function.
• Qualitative odor memory tests and articulation assessments were used.
• A rank order test was utilized to evaluate odor intensity perception.

Main Results:

• The two-step selection method effectively identified anosmia (complete loss of smell) and hyposmia (reduced smell).
• Normal olfactory function was characterized by smell scores ranging from 30 to 42.
• A statistically significant training effect was observed in odor memory and the ability to describe smell impressions.
• The rank order test demonstrated a practical method for subdividing odor intensity into five distinct degrees.

Conclusions:

• The validated two-step selection process is suitable for identifying individuals with olfactory dysfunction.
• The established score range provides a reliable indicator of normal olfactory function.
• Training positively impacts olfactory memory and descriptive abilities, enhancing personnel performance.
• The five-degree subdivision of odor intensity offers a practical tool for sensory analysis.