Attenuated psychotic symptom interventions in youth at risk of psychosis: A systematic review and meta-analysis.

AIM:

Attenuated psychotic symptoms (APSs) have been the primary emphasis in youth at clinical high risk (CHR) for psychosis for assessing symptomology and determining subsequent transition to a psychotic disorder. Previous reviews primarily focused on the efficacy of cognitive behavioural therapy (CBT) on APS; however, a comprehensive assessment of other interventions to date is lacking. Therefore, we conducted a systematic review and meta-analysis of all intervention studies examining APS in CHR youth.

METHOD:

The authors searched Embase, CINAHL, PsycINFO, Medline and EBM from inception to May 2017. Studies were selected if they included any intervention that reported follow-up APS in youth at CHR. Interventions were evaluated and stratified by time using both pairwise and network meta-analyses (NMAs). Due to the differences in APS scales, effect sizes were calculated as Hedges g and reported as the standardized mean difference (SMD).

RESULTS:

Forty-one studies met our inclusion criteria. In pairwise meta-analyses, CBT was associated with a significant reduction in APS compared to controls at 18- to 24-month follow-up (SMD, -0.22; 95% CI, -0.43 to -0.01; I2 =0%; P = .04, 3 studies, N = 356). In the NMA, integrated psychological therapy, CBT, supportive therapy, family therapy, needs-based interventions, omega-3, risperidone plus CBT and olanzapine were not significantly more effective at reducing APS at 6 and 12 months relative to any other intervention.

CONCLUSIONS:

CBT was more effective at reducing APS at long-term follow-up compared to controls. No interventions were significantly more effective at reducing APS compared to all other interventions in the NMA.