Table 3.
Life table analysis for the uncemented ABG I prosthesis with revision of the femoral component as the end point
| Years since operation | Number at start | Number revised | Withdrawn | Death | Loss to followup | Number at risk | Annual failure rate (%) | Annual success rate (%) | Survival rate (%) | 95% confidence interval |
|---|---|---|---|---|---|---|---|---|---|---|
| 0–1 | 69 | 0 | 0 | 0 | 0 | 69 | 0 | 100.0 | 100.0 | 94.7–100.0 |
| 1–2 | 69 | 0 | 0 | 0 | 0 | 69 | 0 | 100.0 | 100.0 | 94.7–100.0 |
| 2–3 | 69 | 0 | 0 | 0 | 0 | 69 | 0 | 100.0 | 100.0 | 94.7–100.0 |
| 3–4 | 69 | 0 | 0 | 0 | 0 | 69 | 0 | 100.0 | 100.0 | 94.7–100.0 |
| 4–5 | 69 | 0 | 0 | 0 | 0 | 69 | 0 | 100.0 | 100.0 | 94.7–100.0 |
| 5–6 | 69 | 0 | 0 | 0 | 0 | 69 | 0 | 100.0 | 100.0 | 94.7–100.0 |
| 6–7 | 69 | 0 | 0 | 0 | 0 | 69 | 0 | 100.0 | 100.0 | 94.7–100.0 |
| 7–8 | 69 | 0 | 0 | 0 | 0 | 69 | 0 | 100.0 | 100.0 | 94.7–100.0 |
| 8–9 | 69 | 0 | 0 | 0 | 0 | 69 | 0 | 100.0 | 100.0 | 94.7–100.0 |
| 9–10 | 69 | 0 | 0 | 0 | 0 | 69 | 0 | 100.0 | 100.0 | 94.7–100.0 |
| 10–11 | 69 | 1 | 0 | 0 | 0 | 69 | 1.4 | 98.6 | 98.6 | 92.3–100.0 |
| 11–12 | 68 | 0 | 0 | 0 | 0 | 68 | 0 | 100.0 | 98.6 | 92.2–100.0 |
| 12–13 | 68 | 0 | 0 | 0 | 0 | 68 | 0 | 100.0 | 98.6 | 92.2–100.0 |
| 13–14 | 68 | 0 | 21 | 0 | 0 | 57.5 | 0 | 100.0 | 98.6 | 91.3–100.0 |
| 14–15 | 47 | 0 | 12 | 1 | 0 | 40.5 | 0 | 100.0 | 98.6 | 88.8–100.0 |
| 15–16 | 34 | 1 | 11 | 0 | 0 | 28.5 | 3.5 | 96.5 | 95.1 | 80.1–100.0 |
| 16–17 | 22 | 0 | 7 | 1 | 0 | 18 | 0 | 100.0 | 95.1 | 74.4–100.0 |