Although respondent’s age and education at time of disaster both had significant positive univariate associations with disaster-related PTSD (age: OR 1.2, 95% CI 1.0–1.4; education: OR 2.1, 95% CI 1.1–3.9), neither association remained significant in the multivariate model (model 1) (Table 3). A methodological control for number of years between respondent’s age at disaster and age at interview to investigate the possibility of time-related recall bias added to the model was non-significant (OR 1.4, 95% CI 0.8–2.2).