IL1B and schizophrenia: Other studies have reported no significant association between the IL-1β C-511T or IL-1β C3954T SNP and schizophrenia (112), which disagrees with a meta-analysis in a specific population that reported a moderate association of IL-1β C-511T and C3954T polymorphisms with schizophrenia in Caucasian samples, suggesting that the genetic effect of IL-1β on schizophrenia may be ethnicity dependent (113).