Table 3.

Statistics used in determining the optimal cutoff value on the mini-PPT for predicting functional status on the original PPT

	CDR = 0, Validation			CDR = 0.5			CDR = 1
Cutoff	= 11	= 12	= 13	= 11	= 12	= 13	= 11	= 12	= 13
Sensitivity 95% CI	0.94	0.86	0.67	0.91	0.78	0.57	0.98	0.75	0.53
	0.90–0.98	0.81–0.91	0.60–0.74	0.87–0.95	0.72–0.84	0.50–0.64	0.94–1.02	0.64–0.87	0.39–0.66
Specificity 95% CI	0.75	0.90	0.97	0.76	0.90	0.97	0.77	0.94	0.99
	0.67–0.83	0.85–0.96	0.94–1.00	0.70–0.81	0.87–0.94	0.95–0.99	0.70–0.84	0.90–0.98	0.98–1.01
PPV	0.83	0.92	0.96	0.74	0.86	0.94	0.63	0.83	0.97
	0.78–0.89	0.88–0.96	0.93–1.00	0.69–0.80	0.81–0.91	0.90–0.98	0.52–0.73	0.73–0.94	0.90–1.03
NPV	0.90	0.83	0.69	0.92	0.84	0.75	0.99	0.91	0.84
	0.85–0.96	0.77–0.89	0.62–0.76	0.88–0.95	0.80–0.89	0.70–0.80	0.97–1.01	0.86–0.96	0.79–0.90
%CC	86	88	80	82	85	80	83	89	86

^%CC = % correctly classified