Important caveat: this is a genetic association study, which means that a small but statistically significant fraction of those studied with schizophrenia have

Important caveat: this is a genetic association study, which means that a small but statistically significant fraction of those studied with schizophrenia have this variant compared to those who do not have schizophrenia; I.e., this variant is not responsible for schizophrenia in all individuals, it just might contribute in some. Even that is not clear yet, we just know the correlation exists.