Table 2.
Cumulative incidence of a subsequent incident fracture 1, 2, and 5 years after initial fracture, overall, and by skeletal location of initial fracture
| 1 yeara | 2 yearsb | 5 yearsc | ||||
|---|---|---|---|---|---|---|
| Initial fracture site | Number of patients | % with subsequent fracture (95% CI) | Number of patients | % with subsequent fracture (95% CI) | Number of patients | % with subsequent fracture (95% CI) |
| Outcome: any fracture | ||||||
| Any site | 377,561 | 9.8 (9.7–9.9) | 210,621 | 17.9 (17.7–18.1) | 10,969 | 30.9 (30.0–31.7) |
| Spine | 111,382 | 14.1 (13.9–14.3) | 62,906 | 25.5 (25.2–25.9) | 3349 | 40.1 (38.4–41.8) |
| Pelvis | 23,113 | 11.8 (11.3–12.2) | 13,004 | 20.2 (19.5–20.9) | 673 | 30.5 (27.0–33.9) |
| Clavicle | 4661 | 10.6 (9.7–11.5) | 2509 | 18.3 (16.8–19.8) | 131 | 33.6 (25.5–41.7) |
| Humerus | 35,541 | 8.3 (8.0–8.6) | 19,546 | 15.7 (15.2–16.2) | 928 | 31.8 (28.8–34.8) |
| Radius/ulna | 56,265 | 7.2 (7.0–7.5) | 30,990 | 13.9 (13.5–14.3) | 1492 | 29.4 (27.1–31.7) |
| Hip | 96,090 | 8.3 (8.1–8.5) | 53,987 | 15.0 (14.7–15.3) | 3010 | 25.3 (23.8–26.9) |
| Femur | 12,615 | 7.3 (6.9–7.8) | 7026 | 13.9 (13.1–14.7) | 365 | 24.9 (20.5–29.4) |
| Tibia/fibula | 12,212 | 6.9 (6.5–7.4) | 6761 | 12.1 (11.4–12.9) | 363 | 18.7 (14.7–22.7) |
| Ankle | 25,682 | 4.6 (4.4–4.9) | 13,892 | 9.5 (9.0–10.0) | 658 | 21.0 (17.9–24.1) |
| Outcome: hip fracture | ||||||
| Any site | 377,561 | 2.4 (2.4–2.5) | 210,621 | 4.8 (4.7–4.9) | 10,969 | 10.2 (9.6–10.7) |
| Spine | 111,382 | 3.3 (3.2–3.4) | 62,906 | 6.2 (6.0–6.4) | 3349 | 12.1 (11.0–13.2) |
| Pelvis | 23,113 | 3.8 (3.5–4.0) | 13,004 | 6.4 (6.0–6.9) | 673 | 9.7 (7.4–11.9) |
| Clavicle | 4661 | 3.5 (3.0–4.0) | 2509 | 6.3 (5.4–7.3) | 131 | 12.2 (6.6–17.8) |
| Humerus | 35,541 | 2.8 (2.6–2.9) | 19,546 | 5.2 (4.9–5.5) | 928 | 12.9 (10.8–15.1) |
| Radius/ulna | 56,265 | 2.0 (1.9–2.2) | 30,990 | 4.2 (4.0–4.5) | 1492 | 10.6 (9.0–12.2) |
| Hip | 96,090 | 1.7 (1.6–1.8) | 53,987 | 4.0 (3.8–4.1) | 3010 | 9.0 (7.9–10.0) |
| Femur | 12,615 | 1.6 (1.4–1.9) | 7026 | 3.5 (3.1–3.9) | 365 | 6.3 (3.8–8.8) |
| Tibia/fibula | 12,212 | 1.7 (1.4–1.9) | 6761 | 2.9 (2.5–3.3) | 363 | 5.2 (2.9–7.5) |
| Ankle | 25,682 | 1.1 (1.0–1.3) | 13,892 | 2.2 (2.0–2.4) | 658 | 6.1 (4.3–7.9) |
CI confidence interval
aAmong all women with at least 12 months of Medicare coverage parts A + B + D follow-up, or who died within the first 12 months
bAmong all women with at least 24 months of Medicare coverage parts A + B + D follow-up, or who died within the first 24 months
cAmong all women with at least 60 months of Medicare coverage parts A + B + D follow-up, or who died within the first 60 months