Table 1:

Supervised downstream tasks in frozen or fine-tune scenarios. Left: Age regression on healthy subjects with R2 as an evaluation metric. Right: classification on ADNI dataset with BACC as the metric.

Methods	Health Aging (R2)		ADNI (BACC)
	Age		NC vs AD		sMCI vs pMCI
	Frozen	Fine-tune	Frozen	Fine-tune	Frozen	Fine-tune
No pretrain	-	0.72	-	79.4	-	69.3
AE	0.53	0.69	72.2	80.7	62.6	69.5
VAE [12]	0.51	0.69	66.7	77.0	61.3	63.8
SimCLR [6]	0.56	0.73	72.9	82.4	63.3	69.5
LSSL [24]	0.59	0.74	74.2	82.1	69.4	71.2
Ours (LNE)	0.62	0.74	81.9	83.6	70.6	73.4