Table 3: Specificity, sensitivity and PPV of MI and MCI in identifying low BMD in lumbar Vertebrae and femural neck regions.

Index	Lumbar vertebrae			Femural neck
	sensitivity	specificity	PPV	sensitivity	specificity	PPV
MI	82.5%	58.1%	64.4%	81.5%	55.4%	60.3%
MCI	80.7%	69.4%	70.7%	81.5%	67.7%	67.7%