The association/ correlation/ - yes, it's there, and it's deeper than people know.
From an individual viewpoint: what doctors call 'anxiety' is often just 'agitation', and correlates with physiological agitation, which they call 'hyperactive' or 'reactive' or 'allergic' (depending on their chosen markers)... these are just names, names for high-energy function, or 'high-function' or 'sur-vival' function. There is another way of looking at this, without the partial names.
These "states" that "change" are exactly what a basic geometric modelling can describe effectively, as a fluid modification or distorsion; this why I developed a method of 'basic topology' for this (topology describes distorsions, large & trans-Formative in mathematical topology, small in geometric topology, with deformation).
The many triggers can be physical or human, external or internal, and their variety, like the many names, can be categorised systematically (using logical 'perspectives'); I developed a method for this too; the whole they constitute is an 'Ecology of Health'.
The changing states may become set as traits and this involves certain topologic properties. This is linked to notions of 'dose related effects' (with "paradoxes" such as that of Serotonin reactions), and to notions of reversible or irreversible linked to a process similar to wormholes in physics (passing through a double-sided surface, described also in ancient traditions, with archaic words, and earlier with images of a geometric style). Details of triggers can take forever to map intellectually, and individually require an uncommon degree of self-awareness (sensing one's physiological reactions after noticing influences external and internal), so a higher-order logic using 'perspectival' categorisation for qualitative description and basic geometric topology for modelling how it works is quicker, shows both origins and ends of the developing symptoms, also in a more general way as applied to the drift in human health (and sanity and supposedly non-animal behaviour); it leads to find options more easily, and requires far less research budgets. Yet none at all is devoted to this.
Article Changes in Severity of Allergy and Anxiety Symptoms Are Posi...