J Korean Acad Fam Med.
1999 Sep;20(9):1099-1105.
Normal bone mineral density of Korean women according to age : using cross-calibration equation among several dual energy X-ray absorption metries
- Affiliations
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- 1Department of Family Medicine, College of Medicine, Dankook University, Korea.
- 2Department of Health Policy and Management, College of Medicine, Chungbuk University, Korea.
Abstract
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BACKGROUD: The lack of standardization in measuring bone mineral density (BMD) is generally recognized as an important and unresolver issue. The National Health Insurance System in Korea covers the cost of asteoporosis treatment according to the relative value ( T score < -1.0) of normal BMD. Consideriong this issue, we are concerned about whether Korean women have a normal value of BMD. We analyzed numerous research papers published in Korea which related to BMD, and calculated the normal BMD of Korean women using cross calibration equipment on three different DEXA scanners (Lunar/Norland Hologic).
METHODS
We searched for key words such as 'osteopcsis' and 'bone mineral densito' in the Korean Medical Journal CD- ROM from 1987 to 1997. We received 145 full texts, and analyzed 114 original artides all of which used one af the above three scanners, over 100 normal Korean women as sub and focused an the lumbar spine. We found five artides that fit the criteria. Among the scanners used in the five artides are three were Lunar, one Hologic and one Norland. We substituted the results of Norhnd and Hologic with Lunars using a cross calibration equation, and calculated the mean BMD according to age by using a weighted average. Standard deviations of the calibrated data were calculated by using pooled estimates af variance equation.
RESULTS
The lumbar spire BMD values of narmal Korean women were 1.181+/-0.683(g/cm2) in their thirties, forties, fifties, sixties were 1.128+/-0.144, 0.989+/-0.161, 0.862+/-0.162, respectively in Lunar scanner, 1.020+/-0.586, 0.974+/-0.124, 0.854+/-0.139, 0.746+/-0.139, respectively in Norland seanner.
CONCLUSIONS
We calculated the lumbar spine BMD values for normal Korean women among three major companies using DEXA scanners. Further studies on BMD in randomly selected healthy adult women are needed
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