reports the point prevalence rates of mental ill-health in the cohort. Findings are presented separately for diagnoses using clinical, DC–LD, ICD–10–DCR and DSM–IV–TR diagnostic criteria. The terms used in the table to describe the diagnostic categories are not identical to those used in all the diagnostic manuals as they differ between the manuals, but the correct operational diagnostic criteria as outlined in each manual are used. Only diagnostic categories where the diagnostic criteria are operationalised were included, hence (for example) DC–LD ‘other’, ICD–10–DCR ‘other’, and DSM–IV–TR ‘ not otherwise specified’ (NOS) categories were not included, except where criteria were cited (as these ‘other’ and ‘ NOS’ categories are essentially clinical diagnoses)