Table 1.

Demographic statistics of low and high PiB-BP_ND groups.

Characteristic/test	Low PiB-BPND (BP < 0.20)	High PiB-BPND (BP ≥ 0.20)	t or χ2	p
No.	25	13
Global cortical mean PiB-BPND	0.10 ± 0.07	0.40 ± 0.26	4.06	0.001a
Age, years	70.2 ± 6.9	70.8 ± 7.0	0.24	0.810
Sex M/F	19/6	4/9	7.32	0.007a
Education, years	14.4 ± 2.5	11.7 ± 2.3	3.27	0.002a
Mini-mental state examination	29.3 ± 0.9	29.5 ± 1.1	0.54	0.590

Data are represented as mean ± sd.

^ap < 0.05.