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. 2017 Aug 29;8:216. doi: 10.3389/fendo.2017.00216

Table 3.

Principal component analysis (PCA) synthesis: qualitative analysis of PCA group separation for global PCA and focused PCA.

PCA
P25
P45
P95
Global PCA Focused PCA Global PCA Focused PCA Global PCA Focused PCA
Nucleus accumbens Dopamine++ +++ γ-Aminobutyric acid (GABA)+++, epigenetic+, plasticity+
Ventral tegmental area ++ Epigenetic++, plasticity+
Hypothalamus Plasticity++ GABA+++, plasticity+

A qualitative scale was used for the analysis of the PCA and focused PCA: +++: very good separation; ++: good separation with one rat on the wrong side of the PCA separation; +: quite good separation with two rats (one of each group) on the wrong side, −: no clear separation.