Table 3.
Cox proportional hazard model for covariates associated with treatment failure adjusted for sex, sheltered housing, cognitive impairment, implant angulation, and postoperative tilt
| Variable | Crude | Adjusted |
|---|---|---|
| HR (2.5%–97.5%) | HR (2.5%–97.5%) | |
| Age | 1.0 (1.0–1.0) | 1.0 (1.0–1.1) |
| Sex | ||
| Female | 1.0 Ref. | 1.0 Ref. |
| Male | 0.7 (0.3–1.3) | 0.6 (0.3–1.3) |
| Sheltered housing: | ||
| No | 1.0 Ref. | 1.0 Ref. |
| Yes | 0.5 (0.2–1.0) | 0.4 (0.2–1.1) |
| Cognitive impairment: | ||
| No | 1.0 Ref. | 1.0 Ref. |
| Yes | 0.7 (0.4–1.4) | 0.9 (0.4–2.0) |
| Implant angulation | 1.0 (1.0–1.0 | 1.0 (1.0–1.0) |
| Preoperative tilt: | ||
| –20° | 5.8 (1.7–19) | 7.9 (1.8–35) |
| –10° | 2.9 (1.4–6.3) | 3.6 (1.4–9.3) |
| 0° | 1.5 (1.1–2.1) | 1.6 (1.1–2.5) |
| 10° | 1.0 Ref. | 1.0 Ref. |
| 20° | 1.5 (1.2–2.0) | 1.5 (1.1–2.1) |
| 30° | 3.3 (1.7–6.4) | 3.4 (1.6–7.3) |
| 40° | 7.0 (2.4–21) | 7.5 (2.2–25) |
| Postoperative tilt | 1.0 (1.0–1.0) | 1.0 (1.0–1.1) |
HR = hazard ratio; n = 417.