Table 1 Demographic characteristics of the groups
PS loosening (+) | PS loosening (−) | P | |
|---|---|---|---|
N | 7 | 34 | |
% female | 14 | 55 | |
age | 69.8 ± 8.7 | 67.0 ± 10.9 | 0.23 |
Average N of fused segments of | 5.5 ± 3.1 | 4.9 ± 4.1 | 0.51 |
Average of the examination period after surgery (weeks) | 21.7 | 15.1 | 0.06 |
Displacement angle | 5.7 ± 5.1 | 0.6 ± 0.5 | < 0.00001 |
N of revision surgeries | 2 | 0 |