Table 1.

Overview of demographic and clinical characteristics, and results of PT and LTT

Group 1	Gen	Dental fillings	Familiarity for allergy	Professional exposure	Known allergies	Jewelry allergy	Cosmetic allergy	PT reactivity	LTT response
1	F	Yes	None	None	Ni	Yes	None	++++Ni	++++Ni,+Cr,
2	F	Yes	Yes	None	Ni	Yes	Yes	++Ni	+++Ni,+Cr,+Ti
3	F	Yes	None	None	Ni	Yes	None	++Ni,+Co	+Ni
4	F	Yes	Yes	None	Ni	Yes	None	+++Ni	+Ni,+Cr
5	F	Yes	None	None	Ni,Cr	Yes	None	+Ni	Neg
6	F	Yes	None	Yes	Ni	Yes	Yes	++Ni	Neg
7	F	Yes	None	None	None	Yes	Yes	+Ni	+Ni
8	F	Yes	None	None	None	Yes	Yes	+/−Ni	+Ni
Group 2A
1	F	None	None	None	Ni	None	None	++Ni	+Ni
2	F	Yes	None	None	None	None	None	++Co	+Ni,+Cr,+Mo
3	F	None	None	Yes	Ni	Yes	None	++Ni	++Ni,+Cr
4	F	None	None	Yes	Ni	Yes	None	++Ni	+ Ni
5	F	Yes	None	None	Ni	Yes	None	++Ni	+ Ni
6	F	Yes	None	None	Ni	Yes	None	++Ni	++Ni
7	F	Yes	None	Yes	Ni	Yes	Yes	Neg	+Ni
8	F	Yes	None	None	Ni	Yes	Yes	Neg	+Ni
9	M	Yes	None	Yes	Ni	None	Yes	Neg	+Ni,+Cr,+Co,+Ti
10	F	None	None	None	None	Yes	None	Neg	+Ni,+Cr
11	M	None	None	None	None	None	None	Neg	+Ni
Group 2B
12	F	Yes	Yes	None	None	Yes	Yes	Neg	Neg
13	F	Yes	None	None	None	None	None	Neg	Neg
14	F	Yes	None	None	None	None	None	Neg	Neg
15	M	Yes	None	None	None	None	None	Neg	Neg
16	F	Yes	None	None	None	Yes	Yes	Neg	Neg
17	F	Yes	None	None	None	Yes	None	Neg	Neg
18	F	None	None	None	None	None	None	Neg	Neg
19	F	Yes	None	Yes	None	Yes	None	+Cr	Neg
20	M	Yes	None	None	None	None	None	+Ni,+Co	Neg
21	F	None	None	None	None	None	None	+/−Co	Neg
22	M	Yes	Yes	None	None	None	None	+/− Cr	Neg