Table 2.

Multiple and simple regression results

	R	R2	F	p
Combined	0.630	0.397	3.51	0.040
V1a, BNSTI	0.416	0.173	3.776	0.068
OTR, LSi	0.464	0.215	4.927	0.040
CRF1, Accsh	0.437	0.191	4.248	0.054

Multiple regression for the three receptors/regions identified by the PLS analysis combined or simple regression for each individual receptor/region was performed. Multiple or simple R and R² (percentage of variance in IPS accounted for), F value associated with R, and level of significance (p) are indicated. Although simple regression shows that each region by itself accounts for close to 20% of the variation in IPS, 40% of the variation was accounted for by the combined analysis.