Table 3.

The most common allergens (%) in our study and different regions of Turkey

Allergens	Eskişehir*	İstanbul[12]	İzmir[13]	Ankara[14]	Ankara[15]	Sivas[16]	Ankara[17]
At least one positive allergen	57.8	51.7	31.3	32.3	34.7	48.7	55
Nickel sulfate hexahydrate	27.4	19.1	12.2	17.6	17.3	27.3	19
Potassium dichromate	14.8	11.8	5.6	4.6	3.0	17.5	14.5
Cobalt (ii) chloride hexahydrate	11.9	8.5	7.1	5.3	7.2	19.8	13.0
Textile dye mix	8.1	-	-	-	-	-	-
Fragrance mix i and ii	6.7	5.5	1.9	2.1	2.9	-	9.4
Balsam of Peru	4.4	2.0	2.8	2.1	1.8	-	6.36
P-phenylenediamine (PPD)	4.4	3.7	1.5	1.8	2.6	-	0.6

^*Our study.