Table 4.

Operating characteristics of screening and case-identification strategy by race/ethnicity and education and age

Stage 1: IQCODE ≥ 3.2 and stage 2: SUMFREE ≤ 30
	Sensitivity	Specificity	PPV	NPV
Overall	0.72 (0.65, 0.78)	0.90 (0.87, 0.93)	0.79 (0.72, 0.85)	0.87 (0.83, 0.90)
Hispanic	0.74 (0.60, 0.84)	0.93 (0.86, 0.97)	0.86 (0.73, 0.94)	0.86 (0.77, 0.92)
White–non-Hispanic	0.70 (0.56, 0.81)	0.85 (0.78, 0.91)	0.68 (0.55, 0.80)	0.86 (0.78, 0.92)
Black–non-Hispanic	0.72 (0.60, 0.82)	0.93 (0.88, 0.97)	0.83 (0.71, 0.90)	0.88 (0.82, 0.93)
<8 years	0.76 (0.61, 0.88)	0.90 (0.79, 0.96)	0.84 (0.69, 0.94)	0.84 (0.73, 0.92)
8–11 years	0.69 (0.54, 0.81)	0.88 (0.80, 0.94)	0.76 (0.61, 0.87)	0.84 (0.75, 0.90)
≥12 years	0.72 (0.61, 0.81)	0.92 (0.87, 0.95)	0.78 (0.67, 0.86)	0.89 (0.84, 0.93)
≤75 years	0.67 (0.55, 0.78)	0.93 (0.89, 0.96)	0.77 (0.65, 0.87)	0.89 (0.84, 0.93)
>75 years	0.76 (0.67, 0.84)	0.87 (0.82, 0.92)	0.80 (0.71, 0.87)	0.85 (0.79, 0.90)

Abbreviations: IQCODE, Informant Questionnaire on Cognitive Decline in the Elderly; PPV, positive predictive value; NPV, negative predictive value.