title: Quantification of bone mineral content using dual-photon absorptiometry in a normal Japanese population.
abstract: The bone mineral content of lumbar spine and/or total body were quantified in 217 healthy Japanese (86 males and 131 females) using a Dichromatic Bone Densitometer (Norland Corp., Model 2600). The bone mineral density of the third lumbar vertebra (L3 BMD) decreased significantly after age 20 in males (r = -0.417, p less than 0.0002), with acceleration of the decrease after age 50 (r = -0.621, p less than 0.00002). A significant correlation was found between L3 BMD and age after age 40 (r = -0.747, p less than 0.0001) in females. L3 BMD correlated with both the body height (r = 0.335, p less than 0.0001) and the body weight (r = 0.340, p less than 0.0001). Total bone mineral content from the second to fourth lumbar vertebrae correlated significantly with total body bone mineral (r = 0.880, p less than 0.00001) in these normal subjects. Lumbar spine bone mineral as measured by dual-photon absorptiometry is lower in Japan than the bone mass in the United States, although not lower than in other parts of the world.
authors.affiliation: Second Department of Internal Medicine, Osaka City University Medical School, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Hagiwara
authors.forename: T
authors.initials: T
authors.lastname: Miki
authors.forename: Y
authors.initials: Y
authors.lastname: Nishizawa
authors.forename: H
authors.initials: H
authors.lastname: Ochi
authors.forename: Y
authors.initials: Y
authors.lastname: Onoyama
authors.forename: H
authors.initials: H
authors.lastname: Morii
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001842:Bone and Bones / Q000032:analysis* / Q000000981:diagnostic imaging; D002648:Child; D005260:Female; D006801:Humans; D007564:Japan; D008297:Male; D008875:Middle Aged; D008903:Minerals / Q000032:analysis*; D011877:Radionuclide Imaging; D012737:Sex Factors; D013131:Spine / Q000032:analysis / Q000000981:diagnostic imaging
chemical_list: D008903:Minerals