TNFRSF11B and schizophrenia: Likewise, lower levels of Osteoprotegerin (OPG) correlated with a heightened risk of schizophrenia (OR = 0.969, 95% CI: 0.940–0.999, p = 0.044, FDR = 0.109, via IVW) (refer to Figure 3, Supplementary Table 3).