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Table 5 Concentrations of studied metal ions in the groups of patients at particular stages of the study (data presented as mean ± SD)

From: The concentration of chromium and cobalt ions and parameters of oxidative stress in serum and their impact on clinical outcomes after metaphyseal hip arthroplasty with modular metal heads

Parameter–mean of 2 visits

Unilateral arthroplasty

Bilateral arthroplasty

Biomet ReCap-Magnum group n = 35

J&J DePuy ASR group n = 34

Change %

p-value

Biomet ReCap-Magnum group n = 4

J&J DePuy ASR group n = 3

Mean

SD

Mean

SD

  

Mean

SD

Mean

SD

Cr concentration (μg/l)

2.04

1.31

10.45

18.16

413

0.008

3.99**

1.06

49.3#

103.04

Co concentration (μg/l)

1.58

0.93

9.26

13.20

487

0.001

2.98*

1.46

40.5##

107.68

Ni concentration (μg/l)

0.86

0.29

0.97

0.30

13

0.130

1.01

0.31

0.92

0.20

Co/Cr ratio

0.89

0.46

1.20

0.87

35

0.070

0.73

0.19

1.27

0.41

  1. Bold values indicate p < 0.05
  2. *p < 0.05 **p < 0.01 in comparison to Biomet ReCap-Magnum group
  3. #p < 0.05 ##p < 0.01 in comparison to &J DePuy ASR group