Selection of study cohorts from the Western Australia Data Linkage System. Abbreviations: ED, emergency department data; ER, electoral roll registrations; MBS, Medicare Benefits Scheme data; MHCs, mental health clients; MHR, mental health registry; non-MHC, non-mental health clients; PBS, Pharmaceutical Benefits Scheme data; WADLS, the Western Australian Data Linkage System. * Patients who had contact with a community mental health service, but for whom clinicians provided no further information on the number of service contacts. These could be referrals, once-only visits or situations in which health services were not compliant in providing service contact data.
Mai et al. BMC Medicine 2011 9:118 doi:10.1186/1741-7015-9-118