Table 5.

The total number of the three most presented systemic symptoms in relation with the cobalt toxicity level in the two most reported bearings (MoM and CoC).

Major systemic symptoms	Bearing type and cobalt Level (ppb)
	MoM, n	Cobalt, mean ± s.d.	CoC, n	Cobalt, mean ± s.d.
Neurological C/P	17	127.2 ± 110.9	16	889.1 ± 574.9
Neurological sensory	13	119.4 ± 98.7	19	1000.1 ± 517.9
Cardiovascular	16	169.0 ± 100.2	19	778.4 ± 504.4

C/P, central and peripheral; CoC, ceramic-on-ceramic; MoM, metal-on-metal; ppb, parts per billion.