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

Table 3

Osteoporosis versus no osteoporosis based on DXA of the lumbar spine and of the hip.

DXA Hip	DXA LS
	Osteoporosis	No osteoporosis
Osteoporosis	23	19
No osteoporosis	23	103

Abbreviations: LS = lumbar spine.
Post hoc test (McNemar): Relative risk 1.21; $P=.644$. (Relative risk: the risk of having osteoporosis on lumbar spine DXA in case of a normal hip DXA is 1.21 times higher than the risk of having osteoporosis on hip DXA in case of a normal lumbar spine DXA.)