Development and evaluation of the Trauma Screener-Intellectual Disability: a post-traumatic stress disorder screening tool for adults with mild intellectual disability or borderline intellectual functioning.

The sample was 97 adults living in supported housing in two Dutch intellectual disability services, so it may not apply to adults with MID-BIF in outpatient, forensic, or mental health settings. 56 of 97 met PTSD criteria on the interview, but the authors say this rate should not be used as a clinical prevalence estimate. Many participants needed help completing the adult version: 35 in the first part, 57 in the second part, and 45 in the third part. It remains unclear whether this help influenced responses and the cut-off value. One of the developers of the TS-ID was also involved in collecting some of the data, which may have led to bias. PTSD diagnosis was based only on the DITS-ID interview, not a comprehensive differential diagnostic assessment. The proxy version did not show valid discrimination (AUC .60, p = .10), so it cannot be used as a screening result. The cut-off was chosen partly by expert preference for higher sensitivity at the expense of specificity.

The authors declared no conflict of interest. The project was funded by Stichting wetenschappelijk onderzoek 's Heeren Loo and the Academic Collaborative Viveon.

Do not read a score at or above 18 on the adult TS-ID as a PTSD diagnosis. The study treated it as a screening flag for interview assessment, not as a diagnosis.