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Table 2 Incidence rates of distinct types of fractures

From: Osteoporotic fractures in rheumatoid arthritis patients in Argentina: a matched retrospective cohort study

  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