Table 5.
Comparison of demographic data for cemented and reverse hybrid THRs, both for total material and for patients aged < 60 years. Comparison of survival (in %) and relative risk (RR) of revision for cemented and reverse hybrid THRs, with all revisions as endpoint, for total material and for patients aged < 60 years
| Total material | Age < 60 years | |||||
|---|---|---|---|---|---|---|
| Cemented | Reverse hybrid | p-value | Cemented | Reverse hybrid | p-value | |
| n | 37,666 | 3,963 | 3,480 | 1,647 | ||
| Revisions | 1,140 | 108 | 135 | 41 | ||
| Median follow-up (range) | 4.7 (0–10) | 2.9 (0–10) | < 0.001 b | 5.2 (0–10) | 3.4 (0–10) | < 0.001 b |
| Mean age (min–max) | 73 (16–98) | 61 (18–92) | < 0.001 b | 54 (16–60) | 52 (18–60) | < 0.001 b |
| % < 60 years | 9 | 42 | < 0.001 a | 100 | 100 | |
| % male | 29 | 36 | < 0.001 a | 36 | 39 | 0.06 a |
| Deceased | 5,928 (15.7%) | 104 (2.6%) | 229 (6.6%) | 25 (1.5%) | ||
| Emigrated | 58 (0.2%) | 8 (0.2%) | 21 (0.6%) | 4 (0.4%) | ||
| Missing | 2 | 0 | 0 | 0 | ||
| Alive | 31,678 (84.1%) | 3,851 (97.2%) | 3,230 (92.8%) | 1,618 (98.2%) | ||
| Diagnosis | < 0.001 a | < 0.001 a | ||||
| Osteoarthritis | 78.6% | 70.9% | 56.6% | 55.9% | ||
| RA/Inflammatory | 3.3% | 4.2% | 8.0% | 6.0% | ||
| Sequelae hip fracture | 8.9% | 5.2% | 7.1% | 4.8% | ||
| Dysplasia | 4.3% | 11.6% | 16.5% | 20.4% | ||
| Perthes' | 0.6% | 2.2% | 3.1% | 4.5% | ||
| Other | 4.4% | 5.9% | 8.7% | 8.4% | ||
| 3-year survival (95%CI) | 97.9 (97.7–98.0) | 97.7 (97.2–98.2) | 98.0 (97.5–98.5) | 98.3 (97.7–99.0) | ||
| 5-year survival (95%CI) | 97.0 (96.8–97.2) | 96.7 (96.0–97.4) | 96.7 (96.0–97.3) | 97.5 (96.6–98.5) | ||
| 7-year survival (95%CI) | 96.0 (95.7–96.2) | 95.6 (94.4–96.7) | 94.9 (94.0–95.9) | 96.2 (94.6–97.8) | ||
| RR c (95%CI) | 1 (Reference) | 1.1 (0.9–1.4) | 0.3 | 1 (Reference) | 0.9 (0.6–1.3) | 0.5 |
a Chi-squared test.
b Non-parametric Mann-Whitney.
c RR adjusted for age, sex, and diagnosis.