“…We used a self-report measure of stress; repeated measures during treatment and physiological measures may provide a more complete picture of the role of stress in retention ( Kyriakou et al, 2019 , Ligabue et al, 2020 , Maddox-Rooper et al, 2022 ). However, the PSS at admission has clinical utility and is correlated with cortisol levels ( van Eck & Nicolson, 1994 ).…”