This study had several limitations. The antecedent psychiatric risk
factors detected in this study (neuroticism and past experience of trauma)
may be attributable to the selection and recall biases. For example,
the healthy volunteers were a cohort of older adults recruited during a
time of frequent ongoing aftershocks in the region, with widespread
community concerns regarding the safety of remaining buildings. The
volunteers were required to attend a clinic in a multistory building to
complete the assessment; this may have biased selection of volunteers
towards individuals with low neuroticism.