Figure 1.

(1a) Proposed model (conceptual). Combat exposure is indirectly associated with health-related behaviors through sleep continuity disturbance and psychological health, respectively. (1b) Proposed model (computational). Indirect effect of combat exposure, health-related behaviors, sleep continuity disturbance, and psychological health serially = a₁d₂₁b₂. We predict that this indirect relationship will be most robust through sleep discontinuity and post-traumatic stress disorder symptoms. Lower-order effects of combat exposure on health-related behaviors through only sleep discontinuity (a₁b₁) and through only psychological health (a₂b₂) are also shown. The direct effect of combat exposure on health-related behaviors is represented by c¹. (1c) Alternative “reverse” model (conceptual) of indirect association of combat exposure on health-related behaviors. (1d) Alternative “reverse” model (computational). Indirect effect of combat exposure health-related behaviors sleep continuity disturbance and psychological health serially = a₁d₂₁b₂.