Table 2.

Patient and care partner result concordance

	Amyloid PET Scan Result
	Self-report of scan	Positive for cortical amyloid-β	Negative for cortical amyloid-β	Correct reporting of scan results
All dyads (n = 1845)	Patient
	Positive result	1072 58.1%	117 6.3%	1529 (82.9%)
	Negative result	199 10.8%	457 24.8%
	Care partner
	Positive result	1092 59.2%	99 5.4%	1567 (84.9%)
	Negative result	179 9.7%	475 25.8%
MCI dyads (n = 1349)	Patient
	Positive result	731 54.2%	92 6.8%	1101 (81.2%)
	Negative result	156 11.6%	370 27.43%
	Care partner
	Positive result	748 55.5%	83 6.2%	1127 (83.5%)
	Negative result	139 10.3%	379 28.1%
Dementia dyads (n = 496)	Patient
	Positive result	341 68.8%	25 5.0%	428 (86.3%)
	Negative result	43 8.67%	87 17.5%
	Care partner
	Positive result	344 69.4%	16 3.2%	440 (88.7%)
	Negative result	40 77.4%	96 19.4%