Fig. 1.
Trait-State-Occasion (TSO) model of depressive symptoms. Simplified illustration, eFigure 1 in SI file for full specification model. C = cognitive-affective score. S = somatic score. Squares represent observed variables; circles represent latent factors. The overall factor measures the longitudinal persistence of depressive symptoms. The cognitive-affective and somatic factors correspond to the two symptom-specific dimensions