Table 1.

Patient Characteristics and Metal Levels for Patients With Metal‐on‐Metal Hip Resurfacing (MOM HR) and a Non Metal‐on‐Metal Total Hip Replacement (Non‐MOM THR)

	MOM HR	Non‐MOM THR
Gender
Male	30	30
Female	4	4
Smoking (current or past)
Yes	12	12
No	22	22
Non‐TJR metal exposure
Yes	4	12
No	30	22
Age at sample (years)
Median (range)	59.7 (49.2–75.7)	59.75 (47.5–75.3)
Time since operation (years)
Median (range)	9.75 (4.9–12.1)	8.75 (1.8–15.9)
Cobalt (μg/L)
Median (range)	1.84 (0.56–36.99)	0.60 (0.17–4.52)
Chromium (μg/L)
Median (range)	2.52 (0.44–27.54)	0.34 (0.12–3.01)