Table 2.
Migration data and RSA precision data measurement at five-year follow-up. The p-values refer to statistical testing of differences in motion between the 2 types of stem and the effect of time versus motion
| Implant | Median 5-year | Range | 95%CI of the median | p-value, difference in motion | Difference in motion 95%CI | p-value, time vs. motion | RSA precision | |
|---|---|---|---|---|---|---|---|---|
| x-rot [deg] | ABG-I | –0.14 | –1.10 to 1.02 | –0.26 to –0.07 | 0.64 | –0.14 to 0.09 | 0.03 | 0.52 |
| Unique | 0.02 | –1.67 to 1.45 | –0.09 to 0.06 | |||||
| y-rot [deg] | ABG-I | 0.15 | –0.89 to 2.93 | –0.01 to 0.36 | 0.41 | –0.14 to 0.33 | 0.08 | 1.36 |
| Unique | –0.08 | –1.66 to 4.43 | –0.30 to 0.56 | |||||
| z-rot [deg] | ABG-I | –0.12 | –0.87 to 0.58 | –0.17 to –0.08 | 0.31 | –0.04 to 0.11 | 0.01 | 0.24 |
| Unique | –0.20 | –0.94 to 0.49 | –0.35 to –0.14 | |||||
| x-trans [mm] | ABG-I | –0.03 | –0.41 to 0.33 | –0.10 to 0.03 | 0.20 | –0.08 to 0.02 | 0.4 | 0.19 |
| Unique | –0.05 | –1.02 to 0.78 | –0.13 to 0.04 | |||||
| y-trans [mm] | ABG-I | –0.03 | –0.50 to 0.27 | –0.09 to –0.01 | 0.15 | –0.07 to 0.42 | 0.02 | 0.21 |
| Unique | –0.13 | –5.36 to 0.59 | –0.18 to –0.05 | |||||
| z-trans [mm] | ABG-I | 0.06 | –0.36 to –0.78 | 0.01 to 0.11 | 0.32 | –0.05 to 0.14 | <0.01 | 0.37 |
| Unique | 0.07 | –0.80 to 1.94 | 0.01 to 0.16 |