Fig. 1.

a to d Histogram of bone mineral density (BMD) as Z-score (SD from the reference mean) in 67 Somali, premenopausal women compared with white American, lumbar spine (a), mean of right and left hip (b), and compared with African–American women, lumbar spine (c), mean of right and left hip (d), according to LUNAR dual energy X-ray absorptiometry (DXA) device reference populations. Count = number of subjects in each bin. The curves indicate the normal distribution according to the manufacturer’s reference population