One week before surgery, youth will complete measures of pain, sleep (Adolescent Sleep Wake Scale; ASWS), pain catastrophizing (PCS - Child version), anxiety and depression symptoms (PROMIS-25), quality of life (PedsQL), PTSD symptoms (CPSS-5), sensitivity to pain traumatization (SPTS-Child version), self-efficacy about pain, expectancies about pain and pain-related fear (Numerical Rating Scales; NRS). Parents will complete measures of sleep (Pittsburgh Sleep Quality Index), pain catastrophizing (PCS-Parent version), measures of anxiety, depression and PTSD symptoms (PROMIS-29 and PCL-5), sensitivity to pain traumatization (SPTS-Parent version), self-efficacy about pain, parent responses to child pain (ARCS), expectancies about pain and pain-related fear (NRS), a socio-demographic survey (parent education, child age, household income), preparation that they/their child received about the surgery and what this entailed (e.g., coping skills, pain management), and family history of surgeries.