Lichen ruber planus in occupational groups in total populations

Area of Science:

• Dermatology
• Occupational Health
• Epidemiology

Background:

• Lichen planus (l.p.) is a common inflammatory condition affecting skin and mucous membranes.
• Occupational exposures are suspected contributors to l.p. development, but specific risk factors remain unclear.
• Understanding occupational prevalence can inform preventive strategies and workplace safety.

Purpose of the Study:

• To determine the prevalence of lichen planus (l.p.) across various occupational groups in Sweden.
• To identify specific occupations and industries with significantly higher or lower l.p. rates.
• To explore potential links between occupational exposures and l.p. development.

Main Methods:

• A population-based study examining 39,418 individuals across 66 occupational groups in five Swedish regions.
• Prevalence of l.p. was calculated for each group, with age standardization to control for demographic variations.
• Computer-generated indices were used for direct ranking of occupational groups by l.p. prevalence.

Main Results:

• Overall l.p. prevalence was 0.3% in males and 0.1% in females.
• No l.p. was found in 33 occupational groups; 24 male and 6 female groups showed above-average prevalence.
• Agriculture, forestry, and metalwork industries exhibited high l.p. rates, particularly in roles involving skin contact with soil, oil, or cement dust.

Conclusions:

• Occupational groups with 'dirty work' (e.g., agriculture, metalwork) showed higher lichen planus (l.p.) prevalence.
• Conversely, 'clean work' environments were associated with lower l.p. rates, though exceptions exist.
• Lower legs and wrists, common sites for l.p. debut, are areas frequently exposed to chemicals and trauma in certain occupations.