“…64 The longitudinal British National Psychiatric Morbidity Survey, which used the PSQ, 65 found that factors independently associated with screening positive included diminished social support, adverse life events, smoking, and a harmful pattern of alcohol consumption-all of which are known to be common in the homeless population. [66][67][68][69][70] Further, despite impressive sensitivity and specificity as per its initial validation, 46 there is likely a major discordance between screening positive on the PSQ and actually meeting diagnostic criteria for a psychotic disorder. For instance, a large study 71 of the prevalence of hallucinations using the PSQ as a screening tool found that only 25% of people who screened positive met the criteria for psychosis based on the gold standard of the Present State Examination.…”