Open Access
Table A.11.
Group analysis by previous surgery.
| Follow up visit | Mean value and comparison within time period |
Comparison by time within subgroups (Bonferroni adjusted p-value) |
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Previous surgery |
No previous surgery | Previous surgery |
No previous surgery |
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| Unadjusted mean ± SD (n) | Unadjusted mean ± SD (n) | p-value | Preop | 6 Month | 1 Year | 2 Year | 3 Year | Preop | 6 Month | 1 Year | 2 Year | 3 Year | |
| UCLA | |||||||||||||
| Preop | 4.1 ± 1.4 (55) | 3.8 ± 1.7 (167) | 0.0400* | − | − | − | − | − | − | − | − | − | − |
| 6 Month | 5.6 ± 1.2 (49) | 5.5 ± 1.5 (146) | 0.5119 | <.0001* | − | − | − | − | <.0001* | − | − | − | − |
| 1 Year | 6.0 ± 1.6 (42) | 5.9 ± 1.6 (136) | 0.6423 | <.0001* | 1.0000 | − | − | − | <.0001* | 0.0336* | − | − | − |
| 2 Year | 6.3 ± 1.8 (34) | 6.0 ± 1.6 (111) | 0.2617 | <.0001* | 0.1756 | 1.0000 | − | − | <.0001* | 0.0013* | 1.0000 | − | − |
| 3 Year | 6.2 ± 1.7 (31) | 6.2 ± 1.6 (112) | 0.8897 | <.0001* | 0.4093 | 1.0000 | 1.0000 | − | <.0001* | 0.0001* | 1.0000 | 1.0000 | − |
| 5 Year | 6.6 ± 1.3 (18) | 6.4 ± 1.5 (58) | 0.8182 | 0.0001* | 1.0000 | 0.9229 | 1.0000 | 1.0000 | <.0001* | 0.0089* | 1.0000 | 1.0000 | 1.0000 |
| EQ5D | |||||||||||||
| Preop | 0.4 ± 0.3 (55) | 0.5 ± 0.3 (167) | 0.7091 | − | − | − | − | − | − | − | − | − | − |
| 6 Month | 0.9 ± 0.1 (49) | 0.9 ± 0.2 (144) | 0.6602 | <.0001* | − | − | − | − | <.0001* | − | − | − | − |
| 1 Year | 0.9 ± 0.2 (41) | 0.9 ± 0.1 (135) | 0.2375 | <.0001* | 1.0000 | − | − | − | <.0001* | 0.0061* | − | − | − |
| 2 Year | 0.9 ± 0.2 (34) | 0.9 ± 0.2 (110) | 0.815 | <.0001* | 1.0000 | 1.0000 | − | − | <.0001* | 0.0838 | 1.0000 | − | − |
| 3 Year | 0.9 ± 0.2 (31) | 0.9 ± 0.2 (112) | 0.2485 | <.0001* | 1.0000 | 1.0000 | 1.0000 | − | <.0001* | 0.0832 | 1.0000 | 1.0000 | − |
| 5 Year | 1.0 ± 0.1 (17) | 0.9 ± 0.1 (56) | 0.4700 | 0.0002* | 0.0586 | 1.0000 | 1.0000 | 1.0000 | <.0001* | 0.0013* | 1.0000 | 1.0000 | 1.0000 |
| HHS | |||||||||||||
| Preop | 49.4 ± 11.7 (55) | 49.5 ± 13.3 (167) | 0.5833 | − | − | − | − | − | − | − | − | − | − |
| 6 Month | 93.2 ± 9.1 (49) | 94.0 ± 8.8 (145) | 0.44 | − | − | − | − | − | <.0001* | − | − | − | − |
| 1 Year | 95.9 ± 7.5 (42) | 96.5 ± 6.4 (135) | 0.7247 | <.0001* | 0.0005* | − | − | − | <.0001* | <.0001* | − | − | − |
| 2 Year | 96.2 ± 6.7 (34) | 96.4 ± 7.3 (110) | 0.2937 | <.0001* | 0.0035* | 0.0403 | – | – | <.0001* | <.0001* | 1.0000 | – | – |
| 3 Year | 95.1 ± 10.4 (31) | 97.4 ± 5.8 (111) | 0.4157 | <.0001* | 0.0251* | 1.0000 | 1.0000 | – | <.0001* | <.0001* | 0.9966 | 0.5599 | – |
| 5 Year | 97.6 ± 3.7 (16) | 97.2±4.9 (57) | 0.9699 | <.0001* | 0.9577 | 1.0000 | 1.0000 | 1.0000 | <.0001* | <.0001* | 0.6425 | 0.2189 | 1.0000 |
| Oxford | |||||||||||||
| Preop | 23.0 ± 7.9 (55) | 21.8 ± 7.5 (167) | 0.3217 | − | − | − | − | − | − | − | − | − | − |
| 6 Month | 43.8 ± 5.3 (49) | 43.2 ± 5.3 (146) | 0.3921 | <.0001* | − | − | − | − | <.0001* | − | − | − | − |
| 1 Year | 43.7 ± 4.2 (42) | 45.1 ± 4.2 (136) | 0.1258 | <.0001* | 0.0001* | − | − | − | <.0001* | <.0001* | − | − | − |
| 2 Year | 45.4 ± 4.3 (34) | 45.3 ± 4.3 (111) | 0.9098 | <.0001* | 1.0000 | 0.0037* | – | – | <.0001* | <.0001* | 1.0000 | − | − |
| 3 Year | 44.9 ± 3.2 (31) | 46.1 ± 3.2 (111) | 0.8579 | <.0001* | 0.214 | 0.1455 | 1.0000 | – | <.0001* | <.0001* | 0.0674 | 0.4474 | – |
| 5 Year | 47.0 ± 2.9 (18) | 46.2 ± 2.9 (58) | 0.3734 | <.0001* | 0.5892 | 1.0000 | 1.0000 | 1.0000 | <.0001* | <.0001* | 1.0000 | 1.0000 | 1.0000 |
| Aluminum (μg/L) | |||||||||||||
| Preop | 13.6 ± 3.1 (5) | 11.8 ± 1.4 (26) | 0.1469 | − | − | − | − | − | − | − | − | − | − |
| 6 Month | 12.5 ± 2.0 (7) | 12.1 ± 1.7 (18) | 0.6065 | 1.0000 | − | − | − | − | 1.0000 | − | − | − | − |
| 1 Year | 18.8 ± 6.8 (3) | 13.5 ± 2.7 (21) | 0.0881 | 1.0000 | − | − | − | − | 1.0000 | 1.0000 | − | − | − |
| 2 Year | 16.0 ± 6.1 (5) | 12.9 ± 1.8 (15) | 0.7851 | 1.0000 | 1.0000 | 1.0000 | – | – | 1.0000 | 1.0000 | 1.0000 | – | – |
| 5 Year | 14.1 ± 0 (1) | 14.1 ± 2.7 (6) | 0.6171 | 1.0000 | 1.0000 | 1.0000 | – | 1.0000 | 1.0000 | 1.0000 | 1.0000 | – | 1.0000 |
| Titanium (μg/L) | |||||||||||||
| Preop | 2.2 ± 0.7 (7) | 2.1 ± 1.1 (2) | 1.0000 | – | – | – | – | – | – | – | – | – | – |
| 6 Month | 3.3 ± 2.0 (12) | 2.0 ± 1.5 (31) | 0.0006 | 1.0000 | – | – | – | – | 1.0000 | – | – | – | – |
| 1 Year | 3.7 ± 2.4 (7) | 2.2 ± 1.5 (28) | 0.0131* | 1.0000 | 1.0000 | – | – | – | 1.0000 | 1.0000 | – | – | – |
| 2 Year | 3.9 ± 4.3 (8) | 2.5 ± 1.0 (19) | 0.632 | 1.0000 | 1.0000 | 1.0000 | – | – | 1.0000 | 1.0000 | 1.0000 | – | – |
| 5 Year | 1.1 ± 0 (1) | 1.4 ± 0.3 (4) | 0.4795 | 1.0000 | 1.0000 | 1.0000 | – | 1.0000 | 1.0000 | 1.0000 | 1.0000 | – | 1.0000 |
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