Unreliability of self-reported burning tendency and tanning ability

Area of Science:

• Dermatology
• Photobiology
• Epidemiology

Background:

• Accurate skin typing is crucial for assessing UV radiation sensitivity.
• The Fitzpatrick skin typing classification is widely used but relies on subjective assessments.
• Previous studies have questioned the reliability of self-reported skin typing methods.

Purpose of the Study:

• To evaluate the reliability of self-administered questionnaires for assessing skin burning and tanning histories.
• To compare self-reported skin typing with objective measures like minimal erythemal dose.
• To determine the correlation between self-reported skin typing and observable complexion characteristics.

Main Methods:

• A self-administered questionnaire was used to collect burning and tanning histories from 790 white students (ages 18-30).
• Skin types were classified using the Fitzpatrick scheme where possible.
• Minimal erythemal dose was measured in a subgroup, and histories were compared with eye/hair color, freckling, and mole counts.

Main Results:

• Only 41.1% of participants could be classified using the Fitzpatrick scheme.
• Skin type I (always burn, never tan) was reported in only 0.3% of cases.
• Self-reported burning tendency showed no significant correlation with minimal erythemal dose; tanning ability correlated better with complexion characteristics.

Conclusions:

• Self-reported burning and tanning histories are an unreliable method for skin typing.
• Objective measures and observable characteristics provide more reliable indicators of skin type than self-assessment.
• The findings highlight the limitations of questionnaires in accurately classifying individuals based on UVR response.