FIGURE 4.

Log-transformed serum corticosterone levels, serum sodium levels, and serum osmolarity. Corticosterone levels in Experiment 3 (group housed) mice consuming 0 and 2% salt, and in Experiment 1 (singly housed) mice consuming 4% salt, were non-normally distributed, so all corticosterone levels were log-transformed to generate normally distributed data for ANOVA analyses. Log-transformed corticosterone levels consistently revealed elevated corticosterone in mice consuming 4% salt in Experiment 3 [group housed, ^∗p = 0.026, (A) right side], Experiment 1 [single housed, ^∗p = 0.016, (A) left side], and Experiment 2 [group housed, ^∗∗∗p = 0.0004 (B)]. Serum sodium (Na⁺) levels were significantly higher in mice consuming 4% salt in both Experiment 3 [group housed, ^∗∗∗p < 0.0005, (C) right side] and Experiment 1 [singly housed, ^∗p = 0.011, (C) left side]. Serum osmolarity was also significantly elevated in both group [Experiment 3; ^∗∗∗p < 0.0001, (D) right side] and single [Experiment 1; ^∗∗p = 0.004, (D) left side] housed mice consuming 4% salt relative to control mice, as indicated by Dunnett’s post hoc testing. Individual data points are shown, with means indicated by horizontal lines, and 95% CI indicated with vertical lines.