Factors Associated With Irritant Reactions on Epicutaneous Patch Testing.

Area of Science:

• Dermatology
• Allergology
• Skin Barrier Research

Background:

• Differentiating allergic and irritant reactions in patch testing presents clinical challenges.
• Understanding factors influencing irritant reactions is crucial for accurate diagnosis.

Purpose of the Study:

• To identify factors associated with irritant patch test reactions.
• To correlate skin barrier function, measured by transepidermal water loss (TEWL), with irritant reactions.

Main Methods:

• Consecutive patients undergoing patch testing were enrolled.
• Demographic data, patch test results, and clinical confidence scores were collected.
• Transepidermal water loss (TEWL) was measured on the volar forearm at the Day 2 reading.

Main Results:

• Older age was significantly associated with irritant reactions (p=0.03).
• No significant correlation was found between TEWL and irritant reactions (p=0.09).
• Clinical confidence scores were lower for irritant reactions compared to positive allergic reactions.

Conclusions:

• Age is a potential factor in irritant reactions, but other factors like atopic dermatitis and TEWL were not significantly correlated.
• Larger studies are needed to determine if TEWL can aid in interpreting irritant patch test reactions.