Faculty Bibliography

The association of environmental and genetic variation in caries with child externalizing behavior problems (inattention, hyperactivity, impulsivity, and defiance) was studied in a sample of 239 pairs of 3- to 8-year-old impoverished Brazilian twins. It was hypothesized that externalizing problems would show a stronger positive association with environmental than genetic variation in caries. Univariate twin models were estimated to parse variation in caries into three components: additive genetic (A), shared environment (C) and non-shared environment/error (E). Age-adjusted associations between externalizing problems and each variance component were tested. Contrary to the hypothesis, modest but very consistent negative associations were found between externalizing problems and both genetic and environmental variation in caries. Mutans streptococci and sweetness preference did not explain the negative associations of caries and externalizing problems. Externalizing problems in non-medicated children were associated with less dental decay that could be explained by both genetic and environmental factors. (c) 2014 S. Karger AG, Basel.

Although previous research has shown a negative relation between partner support and posttraumatic stress disorder (PTSD) symptom severity among military service members following deployment, the mediating mechanisms of this effect remain poorly understood. This study examined willingness to disclose deployment- and combat-related experiences as a mediating mechanism underlying the linkage between intimate partner support and PTSD symptom severity in a sample of 76 U.S. Air Force service members deployed to Iraq in a year-long, high-risk mission. Airmen's reports of overall social support, and partner support specifically, significantly predicted concurrent postdeployment PTSD symptom severity. Subsequent mediation analyses demonstrated that level of disclosure of deployment- and combat-related experiences by service members to their intimate partners accounted for a significant portion of the relation between partner support and postdeployment PTSD symptom severity. The level of Airmen's disclosure was also inversely related to levels of relationship distress. Implications of these findings for prevention and intervention strategies and for further research are discussed.

INTRODUCTION: Tobacco use among military personnel is associated with significant health care expenditures, lost productivity, and compromised combat readiness. The prevalence remains high among military personnel and may increase in high-risk situations such as deployment. We assessed the prevalence of tobacco use across the deployment cycle, changes in tobacco use (nonuse, continued use, initiation/harm escalation, cessation/harm reduction) during deployment, and the impact of deployment history on tobacco use. METHOD: Cigarette smoking, smokeless tobacco (ST) use, and dual tobacco use were evaluated among 278U.S. Air Force Security Forces personnel undertaking a 1-year deployment to a high-threat combat environment. Multinomial regression was used to examine prediction of tobacco use patterns both cross-sectionally and longitudinally. RESULTS: More than half (53%-63%) of all Security Forces used tobacco at all stages of the deployment cycle. Individual tobacco use trajectories showed significant differences in prevalence rates of initiation/harm escalation and cessation/harm reduction when comparing the transition from predeployment to the deployed environment versus returning to postdeployment status. Airmen who had deployed more than once previously had a higher likelihood of using ST use at predeployment and engaging in dual tobacco use during deployment. CONCLUSIONS: Findings suggest the potential benefit of targeted or universal interventions at each stage of the deployment cycle to reduce the onset, maintenance, or escalation of tobacco use behaviors in the U.S. military.

This study examined the influence of trauma history and PTSD symptoms on the behavior of veterans and their intimate partners (287 couples; N=574) observed during conflict discussions and coded using the Rapid Marital Interaction Coding System (Heyman, 2004). Dyadic structural equation modeling analyses showed that PTSD was associated with more frequent displays of hostility and psychological abuse and fewer expressions of acceptance and humor in both veterans and their partners. Findings provide new insight into the social and emotional deficits associated with PTSD and emphasize the importance of addressing the trauma histories and PTSD of both partners when treating veteran couples with relationship disturbance.