Table 1. NPY classification in study sub-samples ^a.

Sub-sample	NPY classification			Classified total	Unclassified
	low	med	high
fMRI	8	35	15	58	12
Pain-stress challenge	15	47	16	78	18
MDD association
Healthy subjects	22	68	23	113	24
MDD subjects	15	19	5	39	5
All subjects	37	87	28	152	29

^aNumber of participants in each sub-sample are shown by NPY expression level (low, medium, high), as predicted by NPY genotype.