Validation of the Psychosocial Assessment Tool Sibling Module Follow-Up Version

Abstract

Abstract Objective Psychosocial screening is recommended to connect siblings of youth with cancer to psychosocial services, but the lack of validated sibling-specific screening tools is a barrier to routine screening. The current study aimed to validate and establish a clinical cutoff for the recently developed Psychosocial Assessment Tool (PAT) Sibling Module follow-up version to address this barrier. Methods Parents (N = 246) completed the PAT Sibling Module follow-up version for all siblings within their families ages 0–17 years (N = 458) at three time points between 6- and 24-month post-cancer diagnosis. For one target sibling within each family aged 8–17 years, parents also completed the Strengths and Difficulties Questionnaire, and the target sibling completed the Child PTSD Symptom Scale. Cross-sectional and longitudinal analyses examined internal consistency and convergent and predictive validity. Receiver operator characteristic analyses were used to establish a maximally sensitive and specific clinical cutoff. Results Internal consistency was acceptable for all age versions (Kuder-Richardson 20s ≥ 0.79), except for the ages 0–2 version, which had low internal consistency at 18 months post-diagnosis (Kuder-Richardson 20 = 0.57). Convergent (r values >0.7, p values <.001) and predictive (r values >0.6, p values <.001) validity were strong at each time point. An optimal clinical cutoff of 0.32 was identified (range: 0.00–1.00). Conclusions The PAT Sibling Module follow-up version is a reliable and valid screener for sibling psychosocial risk following cancer diagnosis. Validation of a sibling-specific screener and establishment of a clinical cutoff are necessary first steps to addressing siblings’ unmet psychosocial needs and improving trajectories of sibling functioning.