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Comparison of the absolute values of apparent bone loss [change in areal bone mineral density (aBMD)] according to age group (black bars 50–60 years, pointed bars 61–70 years, white bars > 70 years at baseline). The slopes are significantly different from 0 (p < 0.005–0.0001) for all regions of interest (ROIs) and for all age groups, except for the trochanter in the youngest group
