Age-related changes in cortical bone in women: metacarpal bone mass measurement study.
The mechanism of age-related cortical bone loss was investigated in 229 Japanese women, 41-94 years of age, by metacarpal bone mass measurement. While no significant correlation was found between bone width and age, a significant increase in bone marrow width, and significant decreases in cortical bone density and total bone mass were observed in association with aging (P < 0.0001). There was a significant negative correlation between total bone mass and bone marrow width (r = -0.239; P < 0.0005), and significant positive correlations between both total bone mass and cortical bone density (r = 0.539; P < 0.0001) and cortical bone width (r = 0.839; P < 0.0001). The findings suggested that age-related cortical bone loss in middle-aged and elderly women resulted from two different factors; a decrease in cortical bone density caused by progression of intracortical porosity, and a decrease in cortical bone width as a result of bone loss on the endosteal surface. The latter had a greater influence on an age-related cortical bone loss than the former.
Iwamoto
J
J
Department of Orthopaedic Surgery, Keio University, 35 Shinanomachi, Shinjuku-ku, Tokyo, Japan.
Takeda
T
T
Otani
T
T
Yabe
Y
Y
D015502:Absorptiometry, Photon; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000375:Aging / Q000502:physiology*; D015519:Bone Density / Q000502:physiology*; D005260:Female; D006801:Humans; D008663:Metacarpus / Q000503:physiopathology*; D008875:Middle Aged; D015663:Osteoporosis, Postmenopausal / Q000175:diagnosis* / Q000503:physiopathology*; D012044:Regression Analysis; D012680:Sensitivity and Specificity