Table 2.

Age-adjusted Pearson’s correlation between Aβ40 and Aβ42, tau, or p-tau (181) values in the six cohorts (Montpellier 1 (Mtp-1), Montpellier 2 (Mtp-2), Paris, SPIN-Barcelona, ADNI-MS, ADNI-Elecsys), in the overall population using mean-centered values to account for level differences between analytical methods

Aß40 correlation	All			NAD or ADNI(−)			AD or ADNI(+)
	p-Tau	Tau	Aß42	p-Tau	Tau	Aß42	p-Tau	Tau	Aß42
Mtp-1	0.501	0.377	0.520	0.557	0.235*	0.764	0.504	0.443	0.613
Mtp-2	0.514	0.443	0.407	0.430	0.244	0.533	0.304	0.213*	0.469
Paris	0.419	0.36	0.188	0.421	0.145*	0.571	0.288	0.245	0.247
SPIN-Barcelona	0.468	0.396	0.161	0.483	0.348	0.419	0.355	0.256*	0.308*
ADNI-MS	0.254	0.413	0.505	0.257	0.496	0.705	0.223*	0.470	0.574
ADNI-Elecsys	0.536	0.567	0.449	0.487	0.624	0.782	0.502	0.496	0.580
Overall	0.445	0.418	0.368	0.455	0.318	0.615	0.339	0.318	0.426

Computation has been done in the All population and in the NAD, AD, ADNI(−), and ADNI(+) groups. Correlation coefficient statistical value P < 0.001 for all but *P < 0.01