Chi-square (χ2) analyses were used to examine the associations between exposure to each MAIN stressor and the diagnostic outcome (No diagnosis, PTSD, CPTSD). Standardised residuals greater than 1.96 indicate significantly more cases of No diagnosis, PTSD and CPTSD than expected under the null hypothesis. We assessed symptoms of PTSD and CPTSD using the International Trauma Questionnaire (ITQ). Before evaluating trauma-related symptoms using the ITQ, participants were asked to describe the index trauma (MAIN stressor). The sample consisted of 224 IDPs. In this case, is it correct to do the chi-square (χ2) analysis for each main stressor? Thank you very much.