Fig. 3

Forest Plot of positive predictive value (PPV) of administrative diagnoses for the respective research diagnosis at disorder level. Whiskers represent 95 % confidence intervals. Sorted by diagnosis (also indicated by shape), then prevalence in the sample prev. Diagnosis has been converted to nearest ICD-10 equivalent, with original code indicated. Size of marker represents square root of complete sample size N. Inpatient (Inpt), Outpatient (Opt) or mixed (I/O) origin of data indicated, with studies using only inpatient diagnoses also having filled marker. Studies using only people in their first episode of illness (1st) or selected on a history of ECT are indicated. Abbreviations: dx = disorder, SzAff = schizo-affective, Uni Depress = unipolar depression, PTSD = post-traumatic stress disorder