A 1994 survey indicated that only 13 health authorities in the UK were purc
hasing access to dual X-ray absorptiometry (DXA), the most accurate measure
of osteoporosis risk. By 1998 the number of centres (including private fac
ilities providing DXA) was 161. All these were sent a questionnaire concern
ing their activities. 124 (77%) responded, and the survey found that DXA ma
chines operate, on average, for only 3.6 days a week. Funding of and access
to diagnostic services for osteoporosis varies greatly. There is clear sco
pe for greater efficiency in the use of existing DXA machines and more equi
table access to diagnostic services is required for effective management of
osteoporosis.