In bivariate probit regression analysis, we found no evidence that ORs representing outcome-specific associations of IL-6 with psychotic disorder and depressive episode differed from the OR representing a common effect of IL-6 on both outcomes (p-value for likelihood ratio test = 0.336), suggesting that IL-6 could be a common risk factor for psychosis and depression (Table 4). The gene discussed is IL6; the disease is major depressive disorder.