Correction to: npj Schizophrenia (2015) 1, Article number: 15025. doi:10.1038/npjschz.2015.25

In the published version of this article, in Table 1, under the entry ‘Cannabis use’, some N (%) data were incorrect due to a minor miscalculation. The corrected table appears below. The authors regret the error.

Table 1 Demographic measures and patterns of drug use in FEP patients and control subjects