Table 4.
Demographic characteristics from all three major implant classes
| Non-MoM DMNTHA (N = 120 patients) | MoM HRA (N = 44 patients) | MoM LHTHA (N = 113 patients) | |
|---|---|---|---|
| Age (years) | 66 (47–87)* | 56 (43–75)* | 60 (31–84)* |
| Sex (% female) | 64 % | 58 % | 54 % |
| Body Mass Index | 28 (17–43)^ | 25 (18–36)^ | 26 (19–59) |
| Implantation Time (months) | 28 (6–65)° | 48 (5–120)° | 60 (23–132)° |
| Symptom Duration (months) | 9 (0–60) | 12 (0–63) | 18 (0–60) |
| Serum Cobalt | 7 (0–169)# | 16 (1–115)# | 13 (4–16)# |
| Serum Chromium | 1 (0–64)§ | 14 (1–160)§ | 60 (23–132)§ |
| Head Size | 28 (22–52)¶ | 46 (38–52)¶ | 46 (36–64)¶ |
| Cup Size | 52 (38–64) | 52 (46–58) | 52 (48–64) |
All values are given as median (range)
*p < 0.005 for the MoM HRA group compared to the other two groups
^p < 0.05 for the MoM HRA group compared to the non-MoM DMNTHA group (p = 0.005)
°p < 0.05 for the non-MoM-DMN THA group compared to the MoM HRA group (p < 0.001) and the MoM LHTHA group (p < 0.001)
# p < 0.05 for the non-MoM DMNTHA group compared to the MoM HRA group (p = 0.042)
§ p < 0.05 for the MoM HRA and the MoM LHTHA groups compared to the non-MoM DMNTHA group (p < 0.001) and the MoM HRA group compared to the MoM LHTHA group (p = 0.026)
¶ p < 0.05 for the MoM HRA (p < 0.001) and the MoM LHTHA (p < 0.001) groups compared to the non-MoM DMNTHA group