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Table 3 Levels of metal ions over time by sex, laterality, and body mass index

From: Intermediate-term trends in serum levels of metal ions after hip resurfacing arthroplasty

Category Preoperation 3 months 12 months 24 months 60 months
Total      
 Cr, ng/ml 0.70 (0.02) 1.19 (0.17)* 1.80 (0.31)* 1.62 (0.25)* 1.20 (0.15)*
 Co, ng/ml 0.73 (0.02) 1.79 (0.39)* 2.71 (0.48)* 3.04 (0.45)* 3.04 (0.49)*
 Mo, ng/ml 0.82 (0.01) 6.78 (0.78)* 7.01 (0.62)* 5.21 (0.55)* 7.52 (0.73)*
Men      
 Cr, ng/ml 0.70 (0.03) 1.06 (0.16) 1.8 (0.52)* 1.2 (0.39)* 1.17 (0.11)*
 Co, ng/ml 0.72 (0.04) 1.55 (0.56)* 2.16 (0.59)* 2.96 (0.78)* 3.6 (0.62)*
 Mo, g/ml 0.82 (0.02) 6.26 (1.41)* 6.91 (1.06)* 4.67 (0.42)* 7.42 (0.57)*
Women      
 Cr, ng/ml 0.70 (0.03) 1.30 (0.29)* 1.81 (0.40)* 1.88 (0.30)* 1.24 (0.28)*
 Co, ng/ml 0.74 (0.03) 2.01 (0.57)* 3.19 (0.72)* 3.09 (0.59)* 2.52 (0.72)*
 Mo, g/ml 0.83 (0.02) 7.23 (0.88)* 7.1 (0.78)* 5.55 (0.86)* 7.6 (1.32)*
Unilateral      
 Cr, ng/ml 0.68 (0.03) 1.15 (0.21)* 1.67 (0.37)* 1.53 (0.27)* 1.33 (0.28)*
 Co, ng/ml 0.72 (0.04) 1.97 (0.5)* 2.32 (0.55)* 3.00 (0.46)* 2.54 (0.7)*
 Mo, g/ml 0.82 (0.02) 6.16 (0.78)* 7.35 (0.66)* 4.84 (0.48)* 7.04 (1.25)*
Bilateral      
 Cr, ng/ml 0.72 (0.02) 1.31 (0.22) 2.06 (0.62)* 2.08 (0.75)* 1.06 (0.06)*
 Co, ng/ml 0.74 (0.03) 1.21 (0.15) 3.50 (0.88)* 3.26 (2.04) 3.63 (0.66)*
 Mo, g/ml 0.83 (0.020 8.86 (2.01)* 6.33 (1.39)* 7.23 (2.56) 8.09 (0.67)*
BMI <25 kg/m2     
 Cr, ng/ml 0.73 (0.02) 1.16 (0.22) 3.03 (1.47) 1.85 (0.45)* 1.29 (0.24)*
 Co, ng/ml 0.71 (0.02) 2.97 (1.05)* 3.41 (1.86) 3.40 (0.74)* 2.8 (0.63)*
 Mo, g/ml 0.83 (0.01) 4.68 (0.56)* 6.86 (3.65) 4.35 (0.74)* 7.12 (1.1)*
BMI ≥25 kg/m2     
 Cr, ng/ml 0.66 (0.02) 1.20 (0.22)* 1.61 (0.28)* 1.47 (0.3)* 1.06 (0.08)*
 Co, ng/ml 0.76 (0.04) 1.44 (0.36)* 2.60 (0.5)* 2.81 (0.6)* 3.45 (0.87)*
 Mo, g/ml 0.81 (0.02) 7.41 (0.92)* 7.03 (0.6)* 5.75 (0.74)* 8.22 (0.65)*
  1. Data shown as mean (standard error)
  2. *Indicated p < 0.05 by nonparametric Kruskal-Wallis test. Data shown as mean (standard error)