J Korean Orthop Assoc JKOA Journal of the Korean Orthopaedic Association 1226-2102 2005-8918 The Korean Orthopaedic Association 10.4055/jkoa.2011.46.6.464 Original Article The Incidence of Osteoporosis and the Necessity of Bone Mineral Density Measurement in Distal Radius Fractures by Minor Trauma Heo Youn Moo M.D. Kim Sang Bum M.D. Yi Jin Woong M.D. Lee Jung Bum M.D. Lee Jin Yong M.D. * Lim Jae Woo M.D. Ryu Sueng Kwon M.D. Department of Orthopedic Surgery, Konyang University College of Medicine, Daejeon, Korea. Department of Preventive Medicine, Konyang University College of Medicine, Daejeon, Korea. Correspondence to: Jin Woong Yi, M.D. Department of Orthopaedic Surgery, Konyang University Hospital, 685, Gasuwon-dong, Seo-gu, Daejeon 302-718, Korea. TEL: +82-42-600-6902 or 9120, FAX: +82-42-545-2373, oeo-oeoeo@hanmail.net 12 2011 29 12 2011 46 6 464 471 26 01 2011 23 05 2011 Copyright © 2011 by The Korean Orthopaedic Association 2011

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

 Purpose

In this study, we examined the incidence of osteoporosis and the related factors in distal radius fractures (DRFs) caused by minor trauma, as well as the necessity of a bone mineral density (BMD) measurement.

 Materials and Methods

One hundred and sixty patients, who had their BMD measured after DRFs caused by minor trauma, were enrolled in this study. The BMD was measured at the lumbar spine and proximal femur by dual energy X-ray absorptiometry. The BMD values were categorized as normal, osteopenia and osteoporosis by the WHO T-score criteria and each incidence was investigated. The BMD values were compared with the change of age and among age-based groups. The relationship between the BMD and factors such as age, gender, body mass index, or AO classifi cation were assessed. The agreement in BMD values between the lumbar spine and proximal femur was evaluated.

 Results

The incidence of osteoporosis in DFRs by minor trauma was 74%. The minimum BMD in the DRFs had a negative correlation with age. Signifi cant differences in the BMD values were observed between the groups divided by the 10-year-old intervals (p<0.001) but the differences in the groups aged over 60 were signifi cantly lower than those under the age of 60 (p<0.001). There was a close relationship between the BMD values and the patients' age (p<0.001), but not between the BMD values and the AO classifi cation (p=0.670). The simple agreement between the lumbar spine and proximal femur was 0.619, but the Kappa index was 0.305.

 Conclusion

Because the incidence of osteoporosis in the DRFs by minor trauma is relatively high, it is necessary to measure the BMD. The BMD should be measured at more than two body parts to ensure that osteoporosis accompanied by DRFs is not missed.

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Changes of the bone mineral density (BMD) according to the change in age. The examination was measured at both lumbar spine (L1-L4) and proximal femur (neck, wards, and trochanter). Graphs show results measured at (A) both spine and femur, (B) spine and (C) proximal femur.

Comparison of a Bone Mineral Density among Patients Divided by the 10-Year-Old Intervals. The BMD of General Population Was Obtained from Korea National Health and Nutritional Survey 200916)

Statistical test was done by ANOVA test. *,†,‡Subgroup types based on Duncan's multiple comparison test. BMD, bone mineral density; SD, standard deviation.

Relationships between the Bone Mineral Density and Factors Such as Age, Gender, Body Mass Index (BMI), or AO Classification in Distal Radius Fractures Caused by Low-Energy Injury

Statistical tests were done by multiple linear regression analyses.

Agreement of the Bone Mineral Density between the Lumbar Spine and Proximal Femur