Trauma exposure and smoking outcomes: The indirect effects of anxious and depressive symptoms

With a direct link between traumatic stress and poor smoking outcomes established, there is a clinically important need to identify underlying, targetable mechanisms that maintain these relations. The present study employed a parallel mediation model to assess the competing explanatory significance of four distinct facets of depression and anxiety (general anxiety, anxious arousal, general depression, and anhedonic depression) in the relation between traumatic load and perceived barriers for quitting smoking, severity of psychosomatic problems experienced when attempting to quit smoking in the past, and negative reinforcement expectancies related to smoking among 98 adult trauma-exposed daily smokers (M_age = 44.64, SD = 10.66). Results showed that only general anxiety symptoms, when controlling for the competing facets of depression and anxiety, had a statistically significant indirect effect on the relation between traumatic load and all smoking processes, such that general anxiety symptoms significantly, indirectly influenced the relation between traumatic load and barriers for smoking cessation (ab = 0.95, 95% CI [0.163, 0.2.14]), smoking quit problems (ab = 0.07, 95% CI [0.009, 0.165]), and negative reinforcement smoking expectancies (ab = 0.16, 95% CI [0.025, 0.399]). Anxious arousal demonstrated an indirect effect for trauma load on only negative reinforcement smoking expectancies (ab = -0.15, 95% CI [-0.345, -0.023]). The current findings highlight the potential importance of general anxiety symptoms as a targetable mechanism for smoking cessation treatments for trauma-exposed smokers.