After FDR adjustment (
PFDR<0.05), we detected protective effects of four immunophenotypes on schizophrenia:
naive CD4+%T cell (maturation stages of T cell panel),
HLA DR on CD14−CD16− (monocyte panel),
CD33dimHLA DR+CD11b−AC (myeloid cell panel) and
activated & resting Treg % CD4 Treg (Treg panel). Specifically, the odds ratio (OR) of
naive CD4+%T cell on SCZ risk was estimated to be 0.986 (95% CI = 0.979 ~ 0.992,
P = 3.97 × 10
− 6,
PFDR = 0.004, Supplementary Table 4) by using the IVW method. Similar results were observed by using three more methods: weighted mode (OR = 0.984, 95% CI = 0.973 ~ 0.995,
P = 0.005); weighted median (OR = 0.986, 95% CI = 0.977 ~ 0.995,
P = 0.003); and MR-PRESSO (OR = 0.986, 95% CI = 0.979 ~ 0.992,
P = 2.14 × 10
− 5). The OR of
HLA DR on CD14−CD16− on SCZ risk was estimated to be 0.738 (95% CI = 0.642 ~ 0.849,
P = 2.00 × 10
− 5,
PFDR = 0.005, Supplementary Table 4) by using the IVW method. Similar results were observed by using three more methods: weighted mode (OR = 0.744, 95% CI = 0.621 ~ 0.891,
P = 0.001); weighted median (OR = 0.714, 95% CI = 0.581 ~ 0.878,
P = 0.001); and MR-PRESSO (OR = 0.737, 95% CI = 0.631 ~ 0.860,
P = 2.50 × 10
− 4). The OR of
CD33dimHLA DR+CD11b−AC on SCZ risk was estimated to be 0.631 (95% CI = 0.529 ~ 0.753,
P = 3.40 × 10
− 7,
PFDR = 2.32 × 10
− 4, Supplementary Table 4) by using the IVW method. Similar results were observed by using three more methods: weighted mode (OR = 0.630, 95% CI = 0.467 ~ 0.849,
P = 0.002); weighted median (OR = 0.562, 95% CI = 0.431 ~ 0.732,
P = 1.95 × 10
− 5); and MR-PRESSO (OR = 0.631, 95% CI = 0.527 ~ 0.757,
P = 1.28 × 10
− 6). The OR of
activated & resting Treg % CD4 Treg on SCZ risk was estimated to be 0.937 (95% CI = 0.906 ~ 0.970,
P = 1.96 × 10
− 4,
PFDR = 0.034, Supplementary Table 4) by using the IVW method. Similar results were observed by using three more methods: weighted mode (OR = 0.945, 95% CI = 0.899 ~ 0.994,
P = 0.028); weighted median (OR = 0.928, 95% CI = 0.879 ~ 0.978,
P = 0.006); MR-PRESSO (OR = 0.937, 95% CI = 0.908 ~ 0.967,
P = 1.48 × 10
− 3). Additionally, both the intercept of MR-Egger and the global test of MR-PRESSO ruled out the possibility of horizontal pleiotropy for these four associations. Detailed information from the sensitivity analysis proved the robustness of the causal associations observed (Supplementary Tables 5, Fig.
2). Scatter plots and funnel plots also indicated the stability of the results (Supplementary Fig. 2).