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Medical Journal of Islamic Republic of Iran، جلد ۲۸، شماره ۱، صفحات ۱۰۱۶-۱۰۲۲
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عنوان انگلیسی Dual-energy X-ray absorptiometry diagnostic discordance between Z-scores and T-scores in a young Iranian population
چکیده انگلیسی مقاله Background: Dual-energy X-ray Absorptiometry (DXA) is considered the gold standard for non-invasive measurement of bone mass. T-scores and Z-scores are used to present the results of bone mass. The present study was designed to evaluate the discordance between T-scores and Z-scores calculated at a same level and its relation with age, gender and body mass index (BMI) in a representative sample of normal population. Methods :This cross-sectional study was conducted as a part of a comprehensive survey, Iranian Multicenter Osteoporosis Study (IMOS), designed to assess bone health among healthy adults. Each individual underwent both L1–L4 antero-posterior lumbar spine and hip DXA scan. The difference between the T- and Z-scores measured at each of the four skeletal sites was then calculated. Results : A -1.21 to 1.21 point difference was noted in the Z- and T- scores measured at each site. While the difference between the T- and Z-scores was less than 0.5 SD in most of the cases, the difference was higher than 1 SD in about 5% of the subjects. Conclusion : Standardization of Z-score definition and calculation techniques as well as developing an ethnicity-matched reference population is needed to improve the reliability of DXA-generated Z-scores.
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نویسندگان مقاله بهنام حیدری | behnam heidari
endocrinology amp; metabolism research center, endocrinology and metabolism clinical sciences institute, tehran univers


پاتریشیا خشایار | patricia khashayar
endocrinology amp; metabolism research center, endocrinology and metabolism clinical sciences institute, tehran university of medical sciences, tehran, iran.

سازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (Tehran university of medical sciences)

محسن رضایی همامی | mohsen rezai homami
rasul-akram hospital, iran university of medical sciences tehran, iran.

سازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (Iran university of medical sciences)

عطیه پژوهی | atieh pajouhi
endocrinology amp; metabolism research center, endocrinology and metabolism clinical sciences institute, tehran university of medical sciences, tehran, iran.

سازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (Tehran university of medical sciences)

اکبر سلطانی | akbar soltani
endocrinology amp; metabolism research center, endocrinology and metabolism clinical sciences institute, tehran university of medical sciences, tehran, iran.

سازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (Tehran university of medical sciences)

باقر لاریجانی | bagher larijani
endocrinology amp; metabolism research center, endocrinology and metabolism clinical sciences institute, tehran university of medical sciences, tehran, iran.

سازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (Tehran university of medical sciences)

نشانی اینترنتی http://mjiri.iums.ac.ir/browse.php?a_code=A-10-1-760&slc_lang=en&sid=en
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