Table 2.

Positive rate of metal patch testing in the total cohort and subgroups.

Subgroups	Total			Male			Female
	N	(+), N	(+), %	N	(+), N	(+), %	N	(+), N	(+), %
	72	19	26.4	14	2	14.3	58	17	29.3
Metal allergic history
(+)	67	19	28.4	12	2	16.7	55	17	30.9
(−)	5	0	0	2	0	0	3	0	0
Type of preoperative MPT
As is	37	2	5.4a	7	0	0	30	2	6.7a
Metal series	6	2	33.3	2	0	0	4	2	50
Both	29	15	51.7	5	2	40	24	13	54.2

^aP < .001 (chi-square).