The optimal cut-off values of FRAX without BMD for predicting osteoporosis fracture risk in the older adults at Nan, Thailand.

Objectives: The World Health Organization developed the Fracture Risk Assessment Tool (FRAX) to assess the risk of having fragility fractures in the next 10 years. The FRAX tool is different by country, race, gender, and age. This study is a community-based study aiming to identify the optimal cut-off values of FRAX for the identification of older individuals who are at high risk of osteoporosis fractures in both genders. Methods: This cross-sectional, analytic study was conducted by using health screening data of the older adults aged 60-90 living in the 3 biggest districts of Nan province, Thailand. Validity and optimal FRAX major osteoporotic fracture (MOF) and hip fracture (HF) cut-off values in both genders were determined. Results: Of 36,042 older adults included in the study, 1624 older people had a history of fragility fractures. Older females were 3.2 and 2.5 times more likely to have fragility fractures and hip fractures than males, respectively. The optimal cut-off values of FRAX MOF for predicting fragility fractures were 3.0% for males and 6.3% for females. The optimal cut-off values of FRAX HF for predicting hip fractures were 1.1% for males and 3.3% for females. Conclusions: A simple screening tool like the FRAX which is available in the annual health screening activities has the potential to be used to predict the risk of developing fragility fractures in rural areas of Thailand. Different cut-off values should be used in females and males because the risk of MOF and HF of both genders is significantly different.