Implications of FRAX® adjusted for recent fracture on the indication of treatment in an FLS

Summary We analyzed the practical consequences of applying an adjusted FRAX® for recent fractures in a FLS. After analyzing 2777 patients, we concluded that the adjusted FRAX® is irrelevant when calculating FRAX® with DXA and is only useful for fractures of the humerus when DXA is not available. Purpose A FRAX® adjusted to fractures less than 2 years old has been proposed. The objective of this work was to analyze the clinical implications of applying the adjusted FRAX® instead of the classic FRAX® in a fracture liaison service (FLS) unit. Methods Adults aged 50 years or older with fragility fractures (hip, spine, humerus, and forearm) that occurred in the 12 months prior to the baseline visit were included. We recorded demographic data, type of fracture, DXA, classic FRAX®, and FRAX® adjusted for recent fractures and indications for anti-osteoporotic medication (AOM) following the guidelines of the Spanish Society of Rheumatology. Results A total of 2777 patients were included, mean age 73 years, 84% women. The type of fracture was as follows: forearm ( n = 958; 34.5%), hip ( n = 781; 28.1%), humerus ( n = 642; 23.1%), and spine ( n = 397, 14.3%). DXA was performed in 2134 cases (76.8%). A total of 2522 patients (90.8%) were candidates for AOM (100% involving the hip and spine, 83% forearm, and 85% humerus). FRAX®-hip ≥ 3% increased from 1601 to 1775 cases (57.6 to 64%). The average FRAX®-hip (SD) increased from 5.7 (6) to 7.5 (9) (4.6 to 8.8 in males and 5.9 to 7.3 in females). The percentage of forearm fracture candidates for AOM, with or without DXA, did not change after FRAX®-hip adjustment, while the number of patients with humerus fractures increased from 59 to 80% in those who did not have DXA. In the entire sample, FRAX®-adjusted led to an indication of AOM for 15 additional patients (0.5% of major fractures): 14 with a humerus fracture and 1 with a forearm fracture. Conclusions The adjusted FRAX® for recent fractures in an FLS unit in an adjusted FRAX® is irrelevant when calculating FRAX® with DXA; in fact, it is only useful for fractures of the humerus when DXA is not available.