Table 2 Cumulative incidence rates of fracture types in case and control groups by time points.
Type of fracture | Cumulative incidence rates (95% CI) | P | ||
|---|---|---|---|---|
At 2 years | At 4 years | At 6 years | ||
Any fracture | 0.001 | |||
Case | 3.1 (2.7–3.5) | 7.3 (6.7–7.9) | 10.2 (9.4–11.0) | |
Control | 1.5 (1.3–1.7) | 4.9 (4.5–5.3) | 8.3 (7.5–9.1) | |
Vertebral fracture | < 0.001 | |||
Case | 1.9 (1.7–2.1) | 4.4 (4.0–4.8) | 6.1 (5.5–6.7) | |
Control | 0.8 (0.6–1.0) | 2.3 (1.9–2.7) | 4.1 (3.5–4.7) | |
Hip fracture | 0.01 | |||
Case | 0.4 (0.2–0.6) | 1.1 (0.9–1.3) | 1.4 (1.2–1.6) | |
Control | 0.1 (0.1–0.1) | 0.5 (0.3–0.7) | 0.8 (0.6–1.0) | |
Upper limb fracture | 0.153 | |||
Case | 0.6 (0.4–0.8) | 1.6 (1.4–1.8) | 2.2 (1.8–2.6) | |
Control | 0.5 (0.3–0.7) | 1.6 (1.4–1.8) | 2.8 (2.4–3.2) | |
