Table 5.
Results of the sensitivity analyses
| Sensitivity analysis | Number of hips | Risk of revision | ||||
|---|---|---|---|---|---|---|
| Cementless versus cemented | Hybrid versus cemented | |||||
| Total | Revised | HR for early revision (95% CI) | HR for late revision (95% CI) | HR for early revision (95% CI) | HR for late revision (95% CI) | |
| Inclusion of unilateral hip replacements with the use of intravenous antibiotic prophylaxis | 4597 | 112 | 3.07 (1.74–5.43) | 1.99 (0.88–4.47) | 1.01 (0.43–2.37) | 0.42 (0.10–1.76) |
| Inclusion of unilateral hip replacements that were the only hip replacements of the patients between 1980 and 2010 | 3097 | 71 | 4.44 (2.18–8.72) | 2.02 (0.78–5.27) | 0.62 (0.15–2.60) | 0.57 (0.13–2.39) |
| Inclusion of operations with the most commonly used stem-cup pairs | 3670 | 80 | 5.85 (2.61–13.11) | .08 (0.50–8.68) | 0.67 (0.09–4.93) | N/A |
| Inclusion of surgery performed in hospital districts where cementless fixation was used in more than 10% of cases | 1056 | 21 | 2.16 (0.44–10.70) | 1.81 (0.63–5.21) | 1.09 (0.11–10.52) | N/A |
| Inclusion of operations from hospital districts where cementless hip replacements were used already in the beginning of the observation period | 1501 | 34 | 2.44 (0.86–6.91) | 2.84 (0.98–8.18) | 0.83 (0.11–.640) | N/A |
The results are expressed as hazard ratios (HRs) (with 95% CIs); N/A = could not be calculated because of insufficient number of cases/endpoint.