Coefficients	Study
	ADNI			AIBL			HABS
	Estimate	Conf. Int.	p-value	Estimate	Conf. Int.	p-value	Estimate	Conf. Int.	p-value
Fixed Parts
Intercept	0.69	−0.11-1.49	.090	0.52	−0.66-1.71	.390	0.77	−0.13-1.67	.095
I(timc_yrs^2)	0.12	0.05-0.19	.001	0.04	0.00-0.08	.030	0.12	0.08-0.16	<.001
PACC_bl	−0.20	−0.29-−0.10	<.001	−0.21	−0.37-−0.06	.008	−0.12	−0.21-−0.03	.013
YrsEd	0.01	−0.01-0.03	.321	0.01	−0.04-0.05	.795	0.01	−0.01-0.03	.195
Age	−0.01	−0.02-−0.00	.005	−0.01	−0.02-0.01	.417	−0.01	−0.01-0.00	.245
SEXF	0.08	−0.52-0.68	.796	0.18	−0.91-1.27	.749	−0.03	−0.72-0.67	.940
Amyloid	0.02	−0.42-0.46	.923	−0.26	−0.93-0.41	.451	−0.66	−1.20-−0.12	.017
I(timc_yrs^2):PACC_bl	0.01	0.00-0.02	.046	−0.00	−0.01-0.00	.633	−0.00	−0.00-0.00	.994
I(timc_yrs^2):YrsEd	0.00	−0.00-0.00	.126	0.00	0.00-0.00	.015	−0.00	−0.00-0.00	.096
I(timc_yrs^2):Agc	−0.00	−0.00-−0.00	.004	−0.00	−0.00-0.00	.269	−0.00	−0.00-−0.00	<.001
I(timc_yrs^2):SEXF	0.01	−0.04-0.06	.665	0.01	−0.02-0.05	.550	0.02	−0.01-0.05	.140
I(timc_yrs^2):Amyloid	−0.08	−0.12-−0.04	<.001	−0.05	−0.07-−0.02	<.001	−0.03	−0.05-−0.01	.005
SEXF:Amyloid	0.00	−0.57-0.57	.999	−0.08	−1.11-0.95	.883	0.14	−0.52-0.80	.682
I(timc_yrs^2): SEXF: Amyloid	−0.00	−0.05-0.04	.855	−0.01	−0.04-0.02	.550	−0.03	−0.06-−0.00	.045
Random Parts
σ2		0.214			0.131			0.143
τ00,ID		0.116			0.189			0.119
NID		330			160			265
ICCID		0.351			0.590			0.455
Observations		1102			510			1164
R2/Ω02		.613/.591			.761/.749			.653/.642