Table 2.
Number of hips in which a small cup size (28-mm femoral head) and larger cup size (32-mm femoral head) were used
| Variable | Size of femoral head | Total | p | |
|---|---|---|---|---|
| 28 mm | 32 mm | |||
| Total number | 37 | 282 | 319 | 0.001 |
| Male gender, number (%) | 12 (32.4%) | 179 (63.5%) | 191 | |
| Female gender, number (%) | 25 (67.6%) | 103 (36.5%) | 128 | |
| Age in years, mean (range) | 47.7 (14–70) | 53.3 (15–70) | 52.7 (14–70) | 0.062 |
| Diagnoses, number (%) | <0.001 | |||
| Osteoarthrosis | 8 (21.6%) | 127 (45.0%) | 135 | |
| Developmental arthritis | 4 (10.8%) | 14 (5.0%) | 18 | |
| Posttraumatic arthritis | 1 (2.7%) | 24 (8.5%) | 25 | |
| Acetabular protrusion | 2 (5.4%) | 12 (4.2%) | 14 | |
| CDH (Crowe Grades 1–2) | 6 (16.2%) | 18 (6.4%) | 24 | |
| CDH (Crowe Grades 3–4) | 7 (21.9%) | 4 (1.4%) | 11 | |
| Rheumatoid arthritis | 4 (12.5%) | 23 (8.1%) | 27 | |
| Avascular necrosis | 5 (15.6%) | 58 (20.6%) | 63 | |
| Others | 0 (0%) | 2 (0.7%) | 2 | |
| Femoral neck length, number (%) | 0.093 | |||
| Short neck | 14 (37.8%) | 70 (24.8%) | 84 | |
| Medium neck | 12 (32.4%) | 144 (51.1%) | 156 | |
| Long neck | 11 (29.7%) | 68 (24.1%) | 79 | |
| Cup fixation, number (%) | 0.004 | |||
| No screws | 18 (48.6%) | 206 (73.0%) | 224 | |
| Screws | 19 (51.3%) | 76 (27.0%) | 95 | |
CDH = congenital dislocation of the hip.