Depression and anxiety as mediators of the relationship between sleep disturbance and somatic symptoms among adolescents on a psychiatric inpatient unit.

Background: This study investigated the relationship between sleep disturbance and somatic symptoms among adolescents residing on a psychiatric inpatient unit. Given the evidence that sleep disturbance may precede the onset of depression and anxiety and the clear associations between mood and somatic symptoms, depression and anxiety were considered as potential mediators of this relationship. Gender was tested as a potential moderator of the relationship between sleep disturbance and depression and anxiety, respectively. Method: A convenience sample of 83 adolescents completed a packet of self-report measures after admission to the unit. Measures assessed depression, sleep disturbance, anxiety, and somatic symptoms. Mediation and moderation analyses were conducted using SPSS PROCESS macro. Results: With anxiety included as a covariate, the overall indirect effect of sleep disturbance on somatic symptoms through depression was significant. No significant moderation effects were found, although females reported significantly higher levels of sleep disturbance, depression, anxiety, and somatic symptoms than males. Conclusions: Results indicated that depression mediated the relationship between sleep disturbance and somatic symptoms above and beyond the effects of anxiety. These findings suggest that interventions aimed at reducing the negative effects of sleep disturbance should also target mood in this population. Individual differences including gender should be considered when developing interventions.

Evaluating posttraumatic stress in young adult cancer survivors: Implications of revised DSM-5 traumatic event criteria.

OBJECTIVE: The Diagnostic and Statistical Manual for Psychiatric Diagnoses (DSM-5) significantly narrowed conditions under which life-threatening illnesses meet qualifying traumatic event (QTE) criteria for posttraumatic stress disorder (PTSD). To investigate the impact of this change on identification of PTSD in young adult cancer survivors (YACS), we compared prevalence of QTE exposure using DSM-5 and earlier DSM-IV criteria. METHODS: The Structured Clinical Interview for the DSM-5 (SCID-5) was customized for study goals and administered to a convenience sample of 250 YACS ages 18-40 followed at a single cancer center. RESULTS: The SCID-5 was well-tolerated by participants and estimated duration was brief (33 min; range 12-75). Only 35 interviews (14%) presented complex scoring questions. 168 participants (67.2%) identified cancer as their "most stressful or traumatic experience." Applying DSM-IV criteria, 227 YACS (90.8%) reported any QTEs; prevalence was significantly reduced following more restrictive DSM-5 QTE criteria, with only 124 YACS (49.6%) reporting ≥1 QTE (z = -9.68, p < 0.001). CONCLUSIONS: The SCID-5 can be successfully adapted to assess QTEs in YACS following both DSM-IV and DSM-5 criteria. DSM-5 criteria significantly limit prevalence of QTE exposures compared with DSM-IV. As the majority of YACS identify cancer as their most stressful life event, it is critically important to investigate its impact on their psychological functioning. Until more is known about how PTSD symptoms may arise after cancer, clinicians and researchers should adapt PTSD assessments to systematically evaluate the role of cancer as a traumatic event that may lead to PTSD symptoms in YACS.