Whole-Body versus Local DXA-Scan for the Diagnosis of Osteoporosis in COPD Patients

Table 2

Osteoporosis versus no osteoporosis based on local DXA and whole body DXA.

Whole body DXA	Local DXA
	Osteoporosis	No osteoporosis
Osteoporosis	33	5
No osteoporosis	32	98

Post Hoc test (McNemar): Relative risk 6.4; 95% confidence interval 2.93–32.06; $P<.0001$. (Relative risk: the risk of having osteoporosis on local DXA in case of a normal whole-body DXA is 6.4 times higher than the risk of having osteoporosis on whole body DXA in case of a normal local DXA.)