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Type 2 diabetes mellitus severity correlates with risk of hip fracture in patients with osteoporosis.

BACKGROUND
Osteoporosis is a major public health problem because of its associated fractures and the resulting complications. The objective of this study was to identify the association between the severity of type 2 diabetes mellitus (T2DM) and the risk of hip fracture in osteoporotic patients.


METHODS
The patients who received a diagnosis of osteoporosis between 2006 and 2010, with an adequate follow-up between 2006 and 2015, were enrolled in this study. Among patients with T2DM, the severity of the disease was evaluated using the Diabetes Complication Severity Index (DCSI). Logistic regression models were used to calculate the odds ratios and to predict the risk of hip fracture in diabetic osteoporotic patients.


RESULTS
A total of 1188 patients were enrolled in the final study, 87 patients had hip fractures in the follow-up period between 2006 and 2015. Among the diabetic patients, each level of the continuous DCSI was associated with a 1.56-fold greater risk of hip fracture. In further stratification, patients with a DCSI > 3 had a significantly higher risk of hip fracture in comparison with those with a DCSI ≤ 1. The categorical DCSI (DCSI > 3), HbA1c level on the diagnosis of T2DM and duration of diabetes, facilitate predicting the risk of hip fracture.


CONCLUSION
The severity of T2DM reflects the risk of hip fracture in osteoporotic patients. Physicians should pay attention to osteoporotic patients presenting with a high HbA1c level on diagnosis of T2DM and a higher DCSI because of their vulnerability to hip fracture.