TABLE 2.

Subject Summary Statistics Subcategorized by Global PiB: Positive and Negative

Statistic	CN− (n = 14)	CN+ (n = 6)	aMCI− (n = 8)	aMCI+ (n = 9)	naMCI− (n = 6)	AD+ (n = 13)	Two-sided rank sum P
							aMCI+ vs. aMCI−	aMCI+ vs. naMCI	aMCI− vs. naMCI
Age
Median	75.0	78.0	82.0	73.0	75.5	79.0	0.09	0.41	0.33
Range	72.0–88.0	73.0–90.0	76.0–87.0	56.0–87.0	70.0–90.0	54.0–91.0
Education
Median	13.5	16.0	12.0	16.0	12.0	16.0	0.083	0.12	0.55
Range	12.0–20.0	12.0–20.0	11.0–19.0	12.0–20.0	8.0–19.0	8.0–20.0
Memory
Median	10.3	10.5	7.4	6.0	7.9	4.1	0.34	0.098	0.65
Range	8.2–12.8	6.6–12.6	4.7–10.3	3.9–9.1	6.4–8.9	2.4–5.9
Language
Median	10.8	13.3	9.3	9.5	9.3	5.4	0.77	0.55	0.79
Range	8.5–15.0	10.5–14.0	7.0–12.5	7.5–12.0	6.3–12.5	2.0–12.3
Attention
Median	10.3	11.2	8.3	11.0	6.4	5.6	0.067	0.005	0.045
Range	7.7–14.7	7.3–15.3	5.7–12.0	6.7–11.8	2.7–8.3	2.7–11.3
Visuospatial
Median	10.5	12.8	10.8	13.0	6.3	8.0	0.17	0.004	0.002
Range	6.5–14.5	7.5–15.0	9.0–15.0	6.5–15.5	5.0–8.5	2.0–14.0
Short test score
Median	35.0	35.0	32.0	32.0	30.5	20.0	0.52	0.048	0.48
Range	28.0–38.0	30.0–38.0	22.0–35.0	30.0–35.0	23.0–33.0	7.0–34.0
CDR sum of boxes
Median	0.0	0.0	1.0	1.5	0.8	5.5	0.17	0.31	0.90
Range	0.0–0.5	0.0–0.5	0.0–2.5	0.5–4.5	0.0–4.5	1.5–13.0