Validation of AD8-Philippines (AD8-P): A Brief Informant-Based Questionnaire for Dementia Screening in the Philippines

Table 4

Psychometric properties of AD8-P at different cut-off points.

Cut-off	Sensitivity	Specificity	Youden index	PPV	NPV	Correctly identified
≥2 points	96.1; (0.91-0.98)	42.1; (0.34-0.50)	0.38	62.6; (0.56-0.69)	91.4; (0.82-0.96)	57.7; (0.53-0.63)
≥3 points	91.5; (0.85-0.95)	77.9; (0.72-0.83)	0.69	74.9; (0.68-0.81)	92.7; (0.87-0.96)	83.6; (0.79-0.87)
≥4 points	83.0; (0.76-0.88)	90.6; (0.86-0.94)	0.74	86.4; (0.86-0.80)	88.1; (0.83-0.92)	87.4; (0.84-0.91)

All values except Youden’s index are percentages with 95% confidence interval in parentheses. PPV: positive predictive value; NPV: negative predictive value; AD8–P: Filipino version of the AD8.