Table 5 Mathias's Criteria of Occupational Causation of Contact Dermatitis

1. Clinical appearance consistent with contact dermatitis

2. Workplace exposure to potential cutaneous irritants or allergens

3. Anatomical distribution consistent with cutaneous exposure related to the job

4. Temporal relationship between exposure and onset consistent with contact dermatitis

5. Non-occupational exposures excluded as likely causes

6. Removal from exposure leads to improvement of dermatitis

7. Patch or provocation tests implicate a specific workplace exposure