Table 1.

Questionnaire to the exposed patients.

The patient is asked whether the following chemicals have explicitly an irritation action on them: Perfumes Deodorants, shaving lotion Detergents Tobacco smoke or other heavy smoke Fresh printed matters like newspapers Paints, varnishes, glues Hairdresser’s products Different dusts, especially street dust Exhaust fumes, gasoline, oil, other traffic fumes Windshield detergent Formaldehyde or some other known chemical Spices or some other food products

If four or more chemicals, at least in four of the abovementioned groups, explicitly irritate, the diagnosis of multiple chemical sensitivity is probable.