Table 2.

Classification of patients in the advanced and non-advanced groups according to the CDEPA instrument versus clinical judgment

CDEPA instrument	Clinical judgment (gold standard)		Total
	Advanced PD	Non-advanced PD
Advanced PD	63	46	109 (63.0)
Non-advanced PD	2	62	64 (37.0)
Total	65 (37.6)	108 (62.4)	173 (100)

No. (%)

Sensitivity was 96.9%; specificity was 57.4%; false positives were 42.6%; false negatives were 3.1%; positive predictive value was 57.8%; negative predictive value was 96.9%; total accuracy was 72.3%