. Author manuscript; available in PMC: 2014 Oct 28.

Published in final edited form as: Osteoporos Int. 2014 May 9;25(9):2307–2311. doi: 10.1007/s00198-014-2725-2

Table 1.

Variation in use of dual-energy X-ray absorptiometry (DXA) across 306 hospital referral regions, 2011

	Mean (SD)^a	Coefficient of variation	Minimum and maximum	Interquartile range
DXAs per 100 beneficiaries	11.5 (2.1)	0.17	6.3–23.0	10.2–12.5
Short-interval DXAs per 100 beneficiaries	1.2 (0.8)	0.64	0.3–8.0	0.7–1.4
Proportion of DXAs administered at short interval	10.1 % (4.9)	0.48	2.7–34.7 %	6.6–12.0 %
Inter-test interval for short-interval DXAs	15.1 months (0.43)	0.03	13.8–17.8 months	14.7–15.4 months

All results weighted by the number of beneficiaries in each hospital referral region