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Related Experiment Videos

Correlating sensory effects with irritation.

Miranda A Farage1, Marie-Vee Santana, Elizabeth Henley

  • 1The Procter & Gamble Company, Winton Hill Business Center, Cincinnati, Ohio 45224, USA.

Cutaneous and Ocular Toxicology
|October 17, 2006
PubMed
Summary

This study found that objective skin irritation scores from the behind-the-knee (BTK) test often correlated with panelists' reported sensory effects. Product physical characteristics evaluated by the descriptive analysis panel (DAP) also showed links to BTK test outcomes.

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Area of Science:

  • Dermatology
  • Consumer Product Testing
  • Sensory Science

Background:

  • The behind-the-knee (BTK) test is used to evaluate skin irritation from femcare products.
  • Understanding the relationship between objective irritation measures and subjective sensory experiences is crucial for product development.

Purpose of the Study:

  • To investigate correlations between objective erythema scores and subjective sensory effects in the BTK test.
  • To compare descriptive analysis panel (DAP) evaluations of product physical characteristics with BTK test results.
  • To determine if specific product physical attributes correlate with distinct sensory experiences.

Main Methods:

  • Commercial and developmental catamenial products were tested using the BTK method over five consecutive days.

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  • Irritation was objectively graded after product removal.
  • The DAP assessed physical characteristics like plastic feel, scratchiness, glide, and cottony feel.

    • Main Results:

    • Seven out of 15 comparisons showed correlation between sensory effects and objective irritation scores in the BTK test.
    • Thirteen out of 15 comparisons revealed a link between irritation magnitude and adverse sensory effects.
    • In one DAP/BTK comparison, distinct physical characteristics aligned with BTK erythema scores and sensory reports.

    Conclusions:

    • Objective measures in the BTK test often align with consumer-reported sensory experiences.
    • Product physical characteristics, as assessed by DAP, can correlate with irritation and sensory feedback.
    • The BTK test and DAP provide valuable, complementary data for femcare product assessment.