CRP and schizophrenia: Lower levels of urbanicity (Wimberley et al., 2016a) and severely impaired functioning (a GAF functioning score ⩽30; Horsdal et al., 2017b) predicted TRS, but the polygenic risk score for schizophrenia (PRS-SZ; Wimberley et al., 2017) and C-reactive protein levels (Horsdal et al., 2017a) did not predict TRS.