The result of the subgroup analysis demonstrated that DUSP1 expression level was lower in OVCA tissues than that in non-tumour tissues (mRNA subgroup: SMD = −1.14, 95% CI [−2.13, −0.14], p = 0.025; protein subgroup: SMD = -1.52, 95% CI [−1.94, −1.10], p < 0.001). The gene discussed is DUSP1; the disease is neoplasm.