Table 3: Comparison of Statistics in Cases with Normal and Increased Cobolt and Chromium Values in Whole Blood Samples

Normal Chrome and Cobolt Levels (<7 ppm) N=35 (Mean) Increased Chrome and Cobolt Levels (> 7 ppm) N=15 (Mean) Value (P<0.05)
Age at operation § 53.5 years (CI 95%: 49-57.9) 55.3 years (CI 95%: 47.2-63.4) P=.66
Time to Follow Up § 3.45 years (CI 95%: 2.9-4) 3.16 years (CI 95%: 2.3-4) P=.53
Femoral head § 45.8 mm (CI 95%: 43.9-47.7) 44.5 mm (CI 95%: 41.6-47.5) P=.45
Sex (M/F) † 21/14 4/11 P=.03
Type of cup† 10M2A38/25magnum 5M2A38/10magnum P=.73
Satisfaction (+/-)† 28/7 10/5 P=.31
Harris Hip Score (0-100 points) § 74 points (CI 95%: 67.5-80.5) 68.8 points (CI 95%: 55.6-82.2) P=.47
Cup inclination § 42.9° (CI 95%: 39.5-46.3) 43.6° (CI 95%: 39.7-47.5) P=.81

§ Independent t-test.
† Chi2 test.