Page 66 - Post-traumatic stress disorder in adults with mild intellectual disability: Screening, assessment, and brief intensive EMDR therapy
P. 66
Chapter 3
Results
Descriptive statistics
Of the 97 participants, 56 (58%) met the criteria for PTSD using DITS-ID.
Of the individuals diagnosed with PTSD, 22 were male (39%), and 34 were
female (61%); 26 had MID (49%), and 27 had BIF (51%).
Validity and reliability of the Trauma Screener-Intellectual Disability adult
version
The validity of the TS-ID adult version was examined by calculating the
AUC using ROC analysis. The AUC was assessed by comparing the total
symptom frequency score of the TS-ID adult version with the outcome of
the DITS-ID (i.e. the presence/absence of PTSD). The AUC value was .94
(N = 97, SD = .03, p < .001). This indicates the excellent validity of the TS-ID
in distinguishing between individuals with and without a PTSD diagnosis
(see Figure 1).
Figure 1. ROC curve for the TS-ID adult total frequency score and final outcome of the DITS-ID (i.e.
yes or no PTSD).
64
