Abstract
Individuals with major depressive disorder show blunted cortisol responses to psychosocial stressors, but the extent to which this pattern of dampened responding characterizes individuals experiencing sub-clinical levels of depressive symptoms is unknown. This study investigated whether self-reports of depressive and anxious symptoms over the previous two weeks were associated with cortisol responses to a laboratory social stress task. In addition, we tested whether these associations were mediated by baseline cortisol, subjective responses to the task, or health behaviors. Healthy adults (N=76) completed the Mood and Anxiety Symptom Questionnaire prior to engaging in the Trier Social Stress Task. Salivary cortisol was measured at 8 points before and after the task to assess cortisol responding. Linear regressions revealed that men reporting more distress and somatic symptoms had smaller cortisol responses, but anhedonic symptoms were not related to cortisol. Distress was associated with lower baseline cortisol, which in turn statistically mediated the relationship between distress and cortisol response. These results demonstrate that the recent experience of depressive and anxious symptoms is associated with smaller cortisol responses to a psychosocial stressor in a non-clinical population.