Reciprocal Effects of Biopsychosocial Factors of Single Disease and
Multi-Morbidity Etiology
(left panel) includes the same factors, such as shared genes, autonomic
arousal, neurohormones, immune system-related activity, negative and positive
affective dispositions, shared behavioral risk factors, etc., as in Figure 1. In one scenario, two or more
diseases emerge more or less simultaneously because of a shared subset of the
factors, listed in the left panel. The right panel depicts the staggered
emergence of other conditions as a function of downstream biological effects of
the initial disease, acute/chronic stress induced by diagnosis and treatment of
the initial disease and/or the side-effects of medical treatment.