Table 2.
Comparison between patients with and without acceptable cup positioning
| Variable | Acceptable results (n = 19) | Cup malpositioning (n = 15) | Univariate p valuea |
|---|---|---|---|
| Age at revision, years | 0.49 | ||
| ≤65 | 8 (42 %) | 9 (60 %) | |
| >65 | 11 (58 %) | 6 (40 %) | |
| Gender | 0.73 | ||
| Male | 12 (63 %) | 8 (53 %) | |
| Female | 7 (37 %) | 7 (47 %) | |
| Laterality | 1.00 | ||
| Left | 11 (58 %) | 8 (53 %) | |
| Right | 8 (42 %) | 7 (47 %) | |
| Bone defect | 1.00 | ||
| Type IIIA | 12 (63 %) | 10 (67 %) | |
| Type IIIB | 7 (37 %) | 5 (33 %) | |
| Bone graft | 0.20 | ||
| ≤90 ml | 17 (90 %) | 10 (67 %) | |
| >90 ml | 2 (10 %) | 5 (33 %) | |
| Cup size | 0.30 | ||
| Large | 7 (37 %) | 9 (60 %) | |
| Extra large | 12 (63 %) | 6 (40 %) | |
| Screw fixation | 1.00 | ||
| No | 4 (21 %) | 3 (20 %) | |
| Yes | 15 (79 %) | 12 (80 %) | |
| Age, years | 67.4 ± 11.3 | 62.2 ± 13.8 | 0.23 |
| Bone graft, ml | 71.8 ± 59.5 | 93.0 ± 55.6 | 0.30 |
| Cup size, mm | 65 ± 7 | 63 ± 5 | 0.24 |
Fisher’s exact test was used to compare groups for categorical data and Student’s t test for continuous variables. Plus-minus data are mean ± SD
aNo significant factors associated with malpositioning by univariate analysis