“…A recent meta-analysis reported a robust association between flatter diurnal cortisol slopes and worse long-term health outcomes, including cancer (cancer effect size, r = .23; average effect size across all health outcomes, r = .15; Adam, Quinn, Tavernier, McQuillan, Dahlke, & Gilbert, 2017). Furthermore, cortisol levels and functioning, specifically diurnal cortisol decline, have been shown to be responsive to both acute and chronic stressors, particularly social stressors (Adam et al, 2017;Janson & Rohleder, 2017;Miller et al, 2007). Children's attachment to their parents has been shown to be linked with their diurnal cortisol profiles, such that children with disorganized attachment tend to have flatter cortisol slopes than those with non-disorganized attachment (Luijik et al, 2010), and anxiously attached children/adolescents tend to have a reduced cortisol awakening response (Oskis et al, 2011).…”