Table 1.
Characteristics of 32 patients and results for 42 corresponding hips. Data on swelling, clicking, and subluxation sensation are given hipwise for 41 hips (the data on 1 hip are missing). Data on mean OHS (range) and the OHS classification are given hipwise for 40 hips (the data on 2 hips are missing). Data on mean (range) age, follow-up, and inclination angle of the cup are given hipwise for 42 hips
| Total | ARMD | Probable ARMD | ARMD not found | ||
|---|---|---|---|---|---|
| Patients, n | 32 | 6 | 8 | 18 | |
| Males, n | 24 | 6 | 7 | 11 | |
| Serum cobalt, µg/La | 2.5 (0.8–14.9) | 6.9 (1.2–14.9) | 1.5 (0.8–2.6) | 1.5 (0.8–2.6) | |
| Serum chromium, µg/La | 2.1 (0.6–7.6) | 4.4 (1.1–7.6) | 1.5 (1.0–2.4) | 1.6 (0.6–2.5) | |
| Hips, n | 42 | 8 | 8 | 24 | |
| Age, years a | 59 (26–77) | 63 (49–70) | 58 (26–76) | 58 (38–77) | |
| Follow-up, years a | 6.7 (2.4–8.8) | 6.0 (2.4–7.0) | 6.8 (6.3–7.3) | 7.0 (6.2–8.8) | |
| Swelling, n | 2 | 2 | 0 | 0 | |
| Clicking, n | 2 | 2 | 0 | 0 | |
| Subluxation sensation, n | 6 | 2 | 1 | 3 | |
| Inclination angle of the cup, degrees a | 47 (37–64) | 47 (42–61) | 50 (39–64) | 46 (37–60) | |
| OHS a | 44 (21–48) | 40 (33–48) | 45 (32–48) | 44 (21–48) | |
| OHS excellent, n | 30 | 3 | 7 | 20 | |
| OHS good, n | 6 | 4 | 0 | 2 | |
| OHS fair, n | 2 | 1 | 1 | 0 | |
| OHS poor, n | 2 | 0 | 0 | 2 |
a
Mean (range)
ARMD: adverse reaction to metal debris;
OHS: Oxford hip score (42–48 = excellent, 34–41 = good, 27–33 = fair, and 0–26 = poor).