Effects of Social Network Characteristics on Mental Health Outcomes Among United States Army Reserve and National Guard Soldiers.

We sought to examine the relative salience of multiple social network structural characteristics (e.g., size, composition, quality, substance use) for understanding soldiers' mental health symptoms (anger, anxiety, depression, PTSD). Data are drawn from soldiers (N = 421) participating in the Operation: SAFETY study. Negative binomial regression models examined the relationship between ten social network characteristics and mental health outcomes, controlling for age, sex, years of military service, and deployment history. Greater number of close network ties was associated with fewer symptoms of anger, anxiety, and depression (ps < 0.05), but not PTSD. Having more illicit drug-using network ties was associated with greater severity of anxiety symptoms (p < 0.05). Finally, more days spent drinking with network members was related to higher levels of anger (p < 0.05). Interpersonal relationships that entail substance use are associated with greater anxiety and anger while a greater number of close ties is associated with fewer anger, anxiety, and depression symptoms.