Table IV.
Comparison of fractures by stem fixation philosophy.
| Variable | CB stems | PTS stems | p-value* |
|---|---|---|---|
| Total, n | 87 | 497 | |
| Sex, n (%) | 0.005 | ||
| Female | 59 (67.8) | 255 (51.3) | |
| Male | 28 (32.2) | 242 (48.7) | |
| Median age, yrs (IQR) | 83.00 (77.00 to 88.00) | 79.00 (71.00 to 86.00) | 0.003 |
| Stem brand, n (%) | < 0.001 | ||
| C stem AMT | 0 (0.0) | 20 (4.0) | |
| C stem classic | 0 (0.0) | 39 (7.8) | |
| Charnley | 87 (100.0) | 0 (0.0) | |
| CPT | 0 (0.0) | 201 (40.4) | |
| Exeter | 0 (0.0) | 237 (47.7) | |
| UCS grade, n (%) | 0.003 | ||
| AG | 3 (3.4) | 4 (0.8) | |
| AL | 0 (0.0) | 18 (3.6) | |
| B1 | 30 (34.5) | 248 (49.9) | |
| B2 | 25 (28.7) | 127 (25.6) | |
| B3 | 12 (13.8) | 40 (8.0) | |
| C | 17 (19.5) | 60 (12.1) | |
| AO/OTA type, n (%) | < 0.001 | ||
| Oblique | 8 (9.2) | 77 (15.5) | |
| Transverse | 24 (27.6) | 24 (4.8) | |
| Wedge | 7 (8.0) | 17 (3.4) | |
| Spiral | 45 (51.7) | 307 (61.8) | |
| Metaphyseal split | 0 (0.0) | 50 (10.1) | |
| NC | 3 (3.4) | 22 (4.4) |
*
Chi-squared test.
CB, composite beam; IQR, indicates interquartile range; N/A, not applicable; OTA, Orthopaedic Trauma Association; PTS, polished taper-slip; UCS, Unified Classification System.