Human-made disasters (reported by 26.6% of respondents) were associated with significantly higher odds of PTSD than natural disasters (OR 3.3, 95% CI 1.1–9.7) in the multivariate model of disaster characteristics (model 2). Serious injury or death of someone close (reported by 4.3% of respondents) was also a significant predictor (OR 21.5, 95% CI 2.1–222.8), although the wide CI and much higher OR than in the univariate model signalled model instability. Being displaced by the disaster (reported by 27.8% of respondents) was also a significant predictor in the multivariate model (OR 6.6, 95% CI 1.9–22.3) even though it was not significant in the univariate model. Serious injury to the respondent (reported by 1.1% of respondents), while a significant univariate predictor, was not significant in the multivariate model. Finally, the respondent witnessing death (reported by 7.8% of respondents) was not a significant univariate or multivariate predictor.
