Table 1.

Mean + standard deviation (SD) of brain amyloid-β burden measured via positron emission tomography statistically defined region of interest scores (PET statROI) by participants' characteristics, The 90+ Study.

	Category	Number	Mean + SD (range)	P-value†
All		166	0.76 + 0.07 (0.59-0.93)
Sex	Male	65	0.75 + 0.07 (0.59-0.93)	0.27
	Female	101	0.76 + 0.07 (0.60-0.92)
Education: college grad	No	77	0.75 + 0.07 (0.60-0.91)	0.17
	Yes	89	0.77 + 0.07 (0.59-0.93)
Smoking history	Never	80	0.77 + 0.07 (0.59-0.93)	0.10
	Past	85	0.75 + 0.07 (0.60-0.92)
Medical history
High blood pressure	No	75	0.75 + 0.07 (0.59-0.92)	0.32
	Yes	91	0.76 + 0.07 (0.62-0.93)
Diabetes	No	148	0.76 + 0.07 (0.59-0.93)	0.52
	Yes	18	0.75 + 0.09 (0.62-0.90)
Coronary artery disease	No	151	0.76 + 0.07 (0.59-0.92)	0.87
	Yes	15	0.76 + 0.07 (0.68-0.93)
Heart attack	No	155	0.76 + 0.07 (0.59-0.93)	0.69
	Yes	11	0.77 + 0.09 (0.62-0.90)
Heart valve disease	No	159	0.76 + 0.07 (0.59-0.93)	0.39
	Yes	7	0.74 + 0.08 (0.65-0.90)
Congestive heart failure	No	154	0.76 + 0.07 (0.59-0.93)	0.32
	Yes	12	0.74 + 0.08 (0.60-0.92)
Stroke	No	150	0.76 + 0.07 (0.59-0.93)	0.45
	Yes	16	0.75 + 0.06 (0.66-0.86)
TIA	No	137	0.76 + 0.07 (0.60-0.92)	0.14
	Yes	29	0.78 + 0.08 (0.59-0.93)
Any of above	No	44	0.77 + 0.07 (0.64-0.92)	0.52
	Yes	122	0.76 + 0.07 (0.59-0.93)
Depression	No	151	0.76 + 0.07 (0.59-0.93)	0.59
	Yes	15	0.77 + 0.07 (0.68-0.86)
Cognitive status	Normal	107	0.75 + 0.07 (0.60-0.92)	0.004
	Cognitive Impairment No Dementia (CIND)	52	0.76 + 0.08 (0.59-0.93)
	Dementia	7	0.84 + 0.06 (0.71-0.89)

^†For test for difference in mean statROI between groups. Bold values were statistically significant P < 0.05.