1) Participant entries in which Survey 1 has not been completed have been removed.
2) Mean imputation was used to replace missing data from questionnaires in which <20% items were incomplete.
3) Participants who indicated 'Other' for mental health diagnosis were asked to specify their using a free text entry box. This specification has been removed to avoid exposing potentially identifiable information.
4) One participant indicated a diagnosis of schizotypal disorder ('3' for diagnosis). This has been grouped with 'Other' to avoid exposing potentially identifiable information.