Table 2 Incidence rates of distinct types of fractures
RA patients (n = 100) | Controls (n = 200) | P value | |||||
|---|---|---|---|---|---|---|---|
Number of fractures | Patient/years | Incidence rate per 1000 persons/years (95% CI) | Number of fractures | Patient/years | Incidence rate per 1000 persons/years (95% CI) | ||
All fractures | 24 | 1230.76 | 19.5 (12.7–28.6) | 23 | 1900.82 | 12.1 (7.7–18.7) | 0.07 |
Vertebral fractures | 9 | 697.67 | 12.9 (8.9–25.8) | 5 | 1470.58 | 3.4 (1.4–8.1) | 0.01 |
Radius fracture | 5 | 675.67 | 7.4 (3.6–14.9) | 4 | 851.06 | 4.7 (2.3–9.8) | 0.21 |
Ulna fracture | 1 | 1000 | 1.0 (0.1–7.1) | 1 | 1428.57 | 0.7 (0.1–4.7) | 0.39 |
Humerus fracture | 1 | 1000 | 1.0 (0.1–7.1) | 5 | 1219.51 | 4.1 (1.8–8.9) | 0.09 |
Rib fracture | 0 | 0 | 0 | 1 | 1428.57 | 0.7 (0.1–4.7) | 0.30 |
Hip fracture | 5 | 793.65 | 6.3 (2.8–13.4) | 5 | 1470.58 | 3.4 (1.4–8.0) | 0.16 |
Pelvis fracture | 2 | 625 | 3.2 (0.9–9.4) | 2 | 1428.57 | 1.4 (0.3–5.3) | 0.19 |